Description of bolts according to GOST 7798, GOST 7805, DIN 931, DIN 933. Characteristics, design, application

The strength of bolts refers to their property in terms of resistance to influences exerted by external factors. The standard designation of the strength class consists of two numbers separated by a dot, or a two-digit number, also followed by a number separated by a dot. A total of 11 classes are installed. The lowest strength is indicated as follows: 3.6, and the highest - 12.9. Between them, as the strength characteristics deteriorate, the following classes are located: 10.9, 9.8 and 8.8 (together with bolts 12.9 - these are high-strength products), 6.8, 6.6, 5.8 and 5.6 (fasteners of medium strength), 4.8, 4.6 (together with bolts of strength 3.6 their use is allowed to create light-load connections)

Design and Application

The bolt, characterized by strength class 6.8, manufactured in accordance with the requirements of GOSTs 7805, 7798 and DIN 933, 931 standards, is a cylindrical rod. It consists of a section with a thread and a segment with a smooth one. This may be followed by a small headrest, and the whole structure is completed by a hexagonal head.

The scope of application of bolts with strength class 6.8 are those objects for which the integrity of the formed connection is an important factor, even under significant vibration-type impacts and when the parts being fastened are significantly deformed. In particular, these are shipbuilding and railcar building, the mechanical engineering industry, as well as the nuclear industry.

STATE STANDARD OF THE USSR UNION

HEX HEAD BOLTS, ACCURACY CLASS V. GOST 7798-70

Date of introduction01.07.72

1. This standard applies to hex head bolts of accuracy class B with a thread diameter from 6 to 48 mm. The standard fully complies with ST SEV 4728-84. (Changed edition, Amendment No. 4).

2. The design and dimensions of the bolts must correspond to those indicated in the drawing and in the table.
1, 2. (Changed edition, Amendment No. 2-6).
3. Thread - according to GOST 24705. Thread run-out and undercut - according to GOST 27148. Bolt ends - according to GOST 12414.
(Changed edition, Amendment No. 5).
3a.
The radius under the head is in accordance with GOST 24670. 36. Tolerances of dimensions, deviations in shape and location of surfaces and control methods not established by this standard are in accordance with GOST 1759.1. 3c. Allowable bolt surface defects and control methods are in accordance with GOST 1759.2. 3a - 3c. (Introduced additionally, Amendment No. 4).
4.
(Deleted, Amendment No. 4).
5. The head design options are determined by the manufacturer.
5a. It is allowed to produce bolts with a diameter of the smooth part of the rod d1 approximately equal to the average diameter of the thread. (Introduced additionally, Amendment No. 3).
5 B.
To apply markings, it is allowed to manufacture bolts of versions 1 and 2 with a hole on the end surface of the head with dimensions that do not reduce the strength of the head, while the depth of the hole should be no more than 0.4 k. (Introduced additionally, Amendment No. 5).
6. Technical requirements - according to GOST 1759.0.
7. (Deleted, Amendment No. 2).
8. The weight of the bolts is indicated in Appendix 1.

Table 1

Nominal thread diameter, d		6	8	10	12	(14)	16	(18)	20	(22)	24	(27)	30	36	42	48
Step	large	1	1,25	1,5	1,75	2		2,5			3		3,5	4	4,5	5
threads	small	—	1	1,25		1,5					2			3
Rod diameter d1		6	8	10	12	14	16	18	20	22	24	27	30	36	42	48
Turnkey size S		10	13	16	18	21	24	27	30	34	36	41	46	55	65	75
Head height k		4,0	5,3	6,4	7,5	8,8	10,0	12,0	12,5	14,0	15,0	17,0	18,7	22,5	26,0	30,0
Diameter of circumscribed circle e, not less		10,9	14,2	17,6	19,9	22,8	26,2	29,6	33,0	37,3	39,6	45,2	50,9	60,8	71,3	82,6
dw, no less		8,7	11,5	14,5	16,5	19,2	22,0	24,8	27,7	31,4	33,2	38,0	42,7	51,1	59,9	69,4
hw	no less	0,15					0,20								0,25
no more	0,6					0,8
Diameter of hole in rod d3		1,6	2,0	2,5	3,2		4,0			5,0			6,3		8,0
Diameter of the hole in the head d4 H15		2,0	2,5		3,2		4,0							5,0
Distance from the supporting surface to the axis of the hole in the head l2 js15		2,0	2,8	3,5	4,0	4,5	5,0	6,0	6,5	7,0	7,5	8,5	9,5	11,5	13,0	15,0

Notes: 1. Bolt sizes enclosed in brackets are not recommended. 2. It is allowed to manufacture bolts with the dimensions specified in Appendix 2.

table 2

Bolt length, l	Thread length b and the distance from the supporting surface of the head to the axis of the hole in the rod l 1 with a nominal thread diameter d (the sign ´ marks bolts with threads along the entire length of the rod)
	6		8		10		12		(14)		16		(18)		20		(22)		24		(27)		30		36		42		48
	l 1	b	l 1	b	l 1	b	l 1	b	l 1	b	l 1	b	l 1	b	l 1	b	l 1	b	l 1	b	l 1	b	l 1	b	l 1	b	l 1	b	l 1	b
8	—	x	—	x	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
10	—	x	—	x	—	x	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
12	—	x	—	x	—	x	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
14	10	x	—	x	—	x	—	x	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
16	12	x	12	x	—	x	—	x	—	x	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
(18)	14	x	14	x	14	x	—	x	—	x	—	x	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
20	16	x	16	x	16	x	15	x	—	x	—	x	—	x	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
(22)	18	18	18	x	18	x	17	x	17	x	—	x	—	x	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
25	21	18	21	x	21	x	20	x	20	x	19	x	—	x	—	x	—	—	—	—	—	—	—	—	—	—	—	—	—	—
(28)	24	18	24	22	24	x	23	x	23	x	22	x	22	x	—	x	—	x	—	—	—	—	—	—	—	—	—	—	—	—
30	26	18	26	22	26	x	25	x	25	x	24	x	24	x	24	x	—	x	—	—	—	—	—	—	—	—	—	—	—	—
(32)	28	18	28	22	28	26	27	x	27	x	26	x	26	x	26	x	25	x	—	x	—	—	—	—	—	—	—	—	—	—
35	31	18	31	22	31	26	30	30	30	x	29	x	29	x	29	x	28	x	28	x	—	x	—	—	—	—	—	—	—	—
(38)	34	18	34	22	34	26	33	30	33	x	32	x	32	x	32	x	31	x	31	x	—	x	—	—	—	—	—	—	—	—
40	36	18	36	22	36	26	35	30	35	34	34	x	34	x	34	x	33	x	33	x	32	x	—	x	—	—	—	—	—	—
45	41	18	41	22	41	26	40	30	40	34	39	38	39	x	39	x	38	x	38	x	37	x	36	x	—	—	—	—	—	—
50	46	18	46	22	46	26	45	30	45	34	44	38	44	42	44	x	43	x	43	x	42	x	41	x	40	x	—	—	—	—
55	51	18	51	22	51	26	50	30	50	34	49	38	49	42	49	46	48	x	48	x	47	x	46	x	45	x	—	x	—	—
60	56	18	56	22	56	26	55	30	55	34	54	38	54	42	54	46	53	50	53	x	52	x	51	x	50	x	48	x	—	—
65	61	18	61	22	61	26	60	30	60	34	59	38	59	42	59	46	58	50	58	54	57	x	56	x	55	x	53	x	—	—
70	66	18	66	22	66	26	65	30	65	34	64	38	64	42	64	46	63	50	63	54	62	60	61	x	60	x	58	x	58	x
75	71	18	71	22	71	26	70	30	70	34	69	38	69	42	69	46	68	50	68	54	67	60	66	66	65	x	63	x	63	x
80	76	18	76	22	76	26	75	30	75	34	74	38	74	42	74	46	73	50	73	54	72	60	71	66	70	x	68	x	68	x
(85)	81	18	81	22	81	26	80	30	80	34	79	38	79	42	79	46	78	50	78	54	77	60	76	66	75	x	73	x	73	x
90	86	18	86	22	86	26	85	30	85	34	84	38	84	42	84	46	83	50	83	54	82	60	81	66	80	78	78	x	78	x
(95)	—	—	91	22	91	26	90	30	90	34	89	38	89	42	89	46	88	50	88	54	87	60	86	66	85	78	83	x	83	x
100	—	—	96	22	96	26	95	30	95	34	94	38	94	42	94	46	93	50	93	54	92	60	91	66	90	78	88	x	88	x
(105)	—	—	—	—	101	26	100	30	100	34	99	38	99	42	99	46	98	50	98	54	97	60	96	66	95	78	93	90	93	x
110	—	—	—	—	106	26	105	30	105	34	104	38	104	42	104	46	103	50	103	54	102	60	101	66	100	78	98	90	98	x
(115)	—	—	—	—	111	26	110	30	110	34	109	38	109	42	109	46	108	50	108	54	107	60	106	66	105	78	103	90	103	102
120	—	—	—	—	116	26	115	30	115	34	114	38	114	42	114	46	113	50	113	54	112	60	111	66	110	78	108	90	108	102
(125)	—	—	—	—	121	26	120	30	120	34	119	38	119	42	119	46	118	50	118	54	117	60	116	66	115	78	113	90	113	102
130	—	—	—	—	126	32	125	36	125	40	124	44	124	48	124	52	123	56	123	60	122	66	121	72	120	84	118	96	118	108
140	—	—	—	—	136	32	135	36	135	40	134	44	134	48	134	52	133	56	133	60	132	66	131	72	130	84	128	96	128	108
150	—	—	—	—	146	32	145	36	145	40	144	44	144	48	144	52	143	56	143	60	142	66	141	72	140	84	138	96	138	108
160	—	—	—	—	156	32	155	36	155	40	154	44	154	48	154	52	153	56	153	60	152	66	151	72	150	84	148	96	148	108
170	—	—	—	—	166	32	165	36	165	40	164	44	164	48	164	52	163	56	163	60	162	66	161	72	160	84	158	96	158	108
180	—	—	—	—	176	32	175	36	175	40	174	44	174	48	174	52	173	56	173	60	172	66	171	72	170	84	168	96	168	108
190	—	—	—	—	186	32	185	36	185	40	184	44	184	48	184	52	183	56	183	60	182	66	181	72	180	84	178	96	178	108
200	—	—	—	—	196	32	195	36	195	40	194	44	194	48	194	52	193	56	193	60	192	66	191	72	190	84	188	96	188	108
220	—	—	—	—	—	—	215	49	215	57	214	57	214	61	214	65	213	69	213	73	212	79	211	85	210	97	208	109	208	121
240	—	—	—	—	—	—	235	49	235	57	234	57	234	61	234	65	233	69	233	73	232	79	231	85	230	97	228	109	228	121
260	—	—	—	—	—	—	255	49	255	57	254	57	254	61	254	65	254	69	253	73	252	79	251	85	250	97	248	109	248	121
280	—	—	—	—	—	—	—	—	275	57	274	57	274	61	274	65	273	69	273	73	272	79	271	85	270	97	268	109	268	121
300	—	—	—	—	—	—	—	—	295	57	294	57	294	61	294	65	293	69	293	73	292	79	291	85	290	97	288	109	288	121

Notes:

1. Bolts with length dimensions enclosed in brackets are not recommended. 2. Bolts for which the b values are located above the broken line are allowed to be manufactured with a thread length up to the head. An example of a designation for a bolt of version 1 with a thread diameter d=12 mm, with a turnkey size S=18 mm, length l=60 mm, with a large thread pitch with a tolerance range of 6g, strength class 5.8, uncoated: Bolt M12 - 6gх60.58 (S18) GOST 7798-70 The same, version 2, with a turnkey size S=19 mm, with a fine thread pitch with a tolerance range of 6g, strength class 10.9, made of steel grade 40X, with a coating of 01 thickness 6 µm: Bolt 2M12x1.25 - 6gx60.109.40X.016 GOST 7798-70

APPENDIX 1 Reference

Weight of steel bolts (version 1) with coarse thread pitch

Bolt length l , mm	Theoretical weight 1000 pcs. bolts, kg" with nominal thread diameter d , mm
Bolt length l , mm	6	8	10	12	14	16	18	20	22	24	27	30	36	42	48
8	4,306	8,668	—	—	—	—	—	—	—	—	—	—	—	—	—
10	4,712	9,394	16,68	—	—	—	—	—	—	—	—	—	—	—	—
12	5,118	10,120	17,82	—	—	—	—	—	—	—	—	—	—	—	—
14	5,524	10,850	18,96	27,89	—	—	—	—	—	—	—	—	—	—	—
16	5,930	11,570	20,10	29,48	43,98	—	—	—	—	—	—	—	—	—	—
18	6,336	12,300	21,23	31,12	46,21	65,54	—	—	—	—	—	—	—	—	—
20	6,742	13,020	22,37	32,76	48,45	68,49	95,81	—	—	—	—	—	—	—	—
22	7,204	13,520	23,51	34,40	50,69	71,44	99,52	—	—	—	—	—	—	—	—
25	7,871	14,840	25,22	36,86	54,05	75,87	105,10	133,3	—	—	—	—	—	—	—
28	8,537	16,330	26,92	39,32	57,40	80,29	110,60	140,2	—	—	—	—	—	—	—
30	8,981	17,120	28,52	40,96	59,64	83,24	114,30	144,8	193,0	—	—	—	—	—	—
32	9,426	17,910	29,43	42,59	61,87	86,19	118,00	149,4	198,6	237,0	—	—	—	—	—
35	10,090	19,090	31,28	45,34	65,24	90,62	123,60	156,3	207,0	246,9	340,6	—	—	—	—
38	10,760	20,280	33,18	48,00	68,59	95,04	129,20	163,2	215,4	256,9	353,3	—	—	—	—
40	11,200	21,070	34,36	49,78	71,25	97,99	132,90	167,8	221,0	263,5	361,8	474,8	—	—	—
45	12,310	23,040	37,45	54,22	77,30	105,70	142,10	179,4	235,0	280,1	373,0	500,9	—	—	—
50	13,420	25,020	40,53	58,67	83,35	113,60	152,40	190,9	249,0	296,7	404,1	526,9	834,5	—	—
55	14,530	26,990	43,62	63,11	89,39	121,50	162,40	203,7	263,1	313,3	425,3	553,0	872,1	1304	—
60	15,640	28,970	46,70	67,55	95,44	129,40	172,40	216,0	278,9	329,9	446,5	579,0	909,8	1356	—
65	16,760	30,940	49,79	71,99	101,50	137,30	182,40	228,4	293,8	348,8	467,7	605,1	947,4	1407	2009
70	17,870	32,910	52,87	76,44	107,50	145,20	192,40	240,7	308,8	366,5	491,1	631,1	985,0	1458	2076
75	18,980	34,890	55,96	80,88	113,60	153,10	202,40	253,0	323,7	384,3	513,6	659,7	1023,0	1509	2143
80	20,090	36,860	59,04	85,33	119,60	161,00	212,40	265,0	338,6	402,1	536,1	687,5	1061,0	1561	2211
85	21,200	38,840	62,13	89,77	125,70	168,90	222,40	277,7	353,6	419,8	558,6	715,2	1098,0	1612	2278
90	22,310	40,810	65,21	94,20	131,70	176,80	232,40	290,1	368,5	437,6	581,0	743,0	1141,0	1663	2345
95	—	42,790	68,30	98,64	137,80	184,70	242,40	302,4	383,4	455,4	603,5	770,8	1181,0	1715	2412
100	—	44,760	71,38	103,10	143,80	192,60	252,40	314,7	398,3	473,2	626,0	798,5	1221,0	1766	2479
105	—	—	74,47	107,50	149,90	200,50	262,40	327,1	413,3	490,9	648,5	826,3	1261,0	1826	2546
110	—	—	77,55	112,00	155,90	208,40	272,30	339,4	428,2	508,7	671,0	854,1	1301,0	1880	2614
115	—	—	80,63	116,40	162,00	216,30	282,30	351,8	443,1	526,5	693,5	881,8	1341,0	1934	2690
120	—	—	83,72	120,90	168,00	224,20	292,30	364,1	458,1	544,2	716,0	909,6	1381,0	1989	2760
125	—	—	86,80	125,30	174,00	232,10	302,30	376,4	473,0	562,0	738,5	937,4	1421,0	2043	2831
130	—	—	89,89	129,70	180,10	240,00	312,30	388,8	487,9	579,8	761,0	965,2	1461,0	2098	2903
140	—	—	96,06	138,60	192,20	255,80	332,30	413,5	517,8	615,3	806,0	1021,0	1541,0	2207	3045
150	—	—	102,18	147,50	204,30	271,60	352,30	438,1	547,6	650,8	850,1	1076,0	1621,0	2315	3187
160	—	—	108,38	156,40	216,40	287,40	372,30	462,8	577,5	686,4	895,9	1132,0	1701,0	2424	3329
170	—	—	114,58	165,30	228,50	303,20	392,30	487,5	607,4	721,9	940,9	1188,0	1780,0	2533	3471
180	—	—	120,68	174,20	240,60	319,00	412,30	512,2	637,2	757,5	985,9	1243,0	1860,0	2642	3614
190	—	—	126,88	183,10	252,70	333,80	432,30	536,9	667,1	793,0	1031,0	1299,0	1940,0	2751	3756
200	—	—	133,08	191,90	264,70	350,60	452,20	561,5	697,0	828,6	1076,0	1354,0	2020,0	2860	3898
220	—	—	—	209,70	228,90	382,20	492,20	610,9	756,7	899,6	1166,0	1465,0	2180,0	3077	4182
240	—	—	—	227,50	313,10	413,80	532,20	660,3	816,4	970,8	1256,0	1576,0	2340,0	3295	4466
260	—	—	—	245,20	337,60	445,40	572,20	709,6	876,1	1042,0	1346,0	1687,0	2500,0	3513	4751
280	—	—	—	—	361,50	476,90	612,20	759,0	935,9	1113,0	1436,0	1798,0	2660,0	3730	5035
300	—	—	—	—	385,70	508,50	652,20	808,3	995,6	1184,0	1526,0	1910,0	2820,0	3948	5319

(Changed edition , Amendment No. 5)

APPENDIX 2 For reference Additional requirements reflecting
the needs of the national economy
Dimensions in mm

Nominal thread diameter d			10	12	12	22
Turnkey size S			17	19	22	32
Diameter of circumscribed circle e , not less			18,7	20,9	23,9	35,0
d w, not less			15,5	17,2	20,1	29,5
Bolt length l	10	Theoretical weight 1000 pcs. bolts (version 1) with large thread pitch, kg"	18,10	—	—	—
	12		19,24	—	—	—
	14		20,38	29,75	—	—
	16		21,52	31,34	46,52	—
	18		22,65	32,98	48,75	—
	20		23,79	34,62	50,09	—
	22		24,93	36,26	53,23	—
	25		26,64	38,72	56,59	—
	28		28,34	41,18	59,94	—
	30		29,48	42,82	62,18	180,6
	32		30,85	44,45	64,41	186,2
	35		32,70	47,20	67,78	194,6
	38		34,55	49,86	71,13	203,0
	40		35,78	51,64	73,79	208,6
	45		38,87	56,08	79,84	222,6
	50		41,95	60,53	85,89	236,6
	55		45,04	64,97	91,93	250,7
	60		48,12	69,41	97,98	266,5
	65		51,21	73,85	104,00	281,4
	70		54,29	78,30	110,00	296,4
	75		57,38	82,74	116,10	311,3
	80		60,46	87,19	122,10	326,2
	85		63,55	91,63	128,20	341,2
	90		66,63	96,06	134,20	356,1
	95		69,72	100,50	140,30	371,0
	100		72,80	105,00	146,30	385,9
	105		75,89	109,40	152,40	400,9
	110		78,97	113,90	158,40	415,8
	115		82,05	118,30	164,50	430,7
	120		85,14	122,80	170,50	445,7
	125		88,22	127,20	176,50	460,6
	130		91,31	131,60	182,60	475,5
	140		97,48	140,50	194,70	505,4
	150		103,60	149,40	206,80	535,2
	160		109,80	158,30	218,90	565,1
	170		116,00	167,20	231,00	595,0
	180		122,10	176,10	243,10	624,7
	190		128,30	185,00	255,20	654,7
	200		134,50	193,80	267,20	684,6
	220		—	211,60	291,40	744,3
	240		—	229,40	315,60	804,0
	260		—	247,10	339,80	863,7
	280		—	—	364,00	923,5
	300		—	—	388,20	983,2

APPENDIX 2 (Introduced additionally , Amendment No. 5 ; amended edition, Amendment No. 6).
INFORMATION DATA 1. DEVELOPED AND INTRODUCED by the Ministry of Ferrous Metallurgy of the USSR DEVELOPERS I. N. Nedoviziy,
Ph.D.
tech. sciences; B. M. Rigmant;
V. I. Mokrinsky, Ph.D.
tech. sciences 2. APPROVED AND ENTERED INTO EFFECT by the Decree of the Committee of Standards, Measures and Measuring Instruments under the Council of Ministers of the USSR dated March 4, 1970 No. 270 3. The standard fully complies with ST SEV 4728-84 4. INSTEAD GOST 7798-62 5. REFERENCE REGULATIVE AND TECHNICAL DOCUMENTS

Designation of the referenced technical document	Item number	Designation of the referenced technical document	Item number
GOST 1759.0-87	6	GOST 24670-81	3a
GOST 1759.1-82	3b	GOST 24705-81	3
GOST 1759.2-82	3v	GOST 27148-86	3
GOST 12414-66	3

6. The validity period was lifted according to Protocol No. 5-94 of the Interstate Council for Standardization, Metrology and Certification (IUS 11-12-94)
7. REISSUE with Amendments No. 2, 3, 4, 5, 6, approved in February 1974. , March 1981, March 1985, March 1989, July 1995 (IUS 3-74, 6-81, 6-85, 6-89, 9-95)

Execution

The main difference between the provisions of GOST 7805 and GOST 7798 lies in the different accuracy classes of bolts produced according to their standards

The first standard establishes the technical characteristics of fasteners in accordance with the requirements of class “A” - this is increased accuracy.
The second GOST standardizes the parameters of bolts produced with normal accuracy, that is, class “B”.

Another difference is the thread diameters. In GOST 7798, the range of changes in this indicator is from M6 to M24. Standard 7805 additionally includes dimensional characteristics of bolts with thread diameters 5.0, 4.0, 3.5, 3.0, 2.5, 2.0 and 1.6

As for the possible designs of bolts of strength class 6.8, they are the same in both standards. There are 4 options in total.

In this design, the nominal diameter is equal to the diameter of the smooth section of the rod. A small protrusion may be formed under the head. This option is the most widely used.

The head dimensions are similar to the first version. A hole is drilled in the bottom of the rod. When using castle nuts in conjunction with cotter pins, this design solution eliminates the possibility of loosening the connection due to self-unscrewing of the bolt when exposed to vibration loads.

Two holes are made in the adjacent faces of the head, the axes of which are located at an acute angle relative to each other. There are two possible options for using them - this is the same cotter pin or sealing of the connection.

A hole is created on the outer plane of the head for marking the bolt. Taking into account the requirement not to reduce the strength of the fastener, the depth of this hole should not be more than 0.4k, where k is the sum of the heights of the head and the protrusion located under it.

Bolt GOST 7798: bolt m6, m8, m10, m12, m16, m20, m27, m30

GOST 7798-70 is the most famous and most widely used type of bolts. Main purpose: connecting various parts in mechanical engineering.

For their production, medium-carbon steel wire of increased manufacturing precision is used. The steel grades used are steel 10 kp, 20 kp, 10, 20, 35, 40Х, ЗОХР, 45, etc. Production is carried out by cold heading on special machines, followed by thread rolling. GOST 7798-70 - hex head bolts of accuracy class B with thread diameter from 6 to 48 mm (foreign analogues - DIN 933 and DIN 931). The standard fully complies with ST SEV 4728-84.

The design and dimensions are indicated in the drawings and tables:

Table 1

Steel grade:	10 kp, 20 kp, 10, 20, 35, 40Х, ЗОХР, 20Г2Р
Accuracy class:	IN
Strength class:	4,8; 5,8; 8,8; 10,9
Thread tolerance range:	6g
Analogue:	DIN933, 931, TU 14-4-1760-94

Nominal thread diameter d		bolt m6	M8 bolt	M10 bolt	M12 bolt	(14)	M16 bolt	(18)	M20 bolt	(22)	bolt m24	(27)	bolt m30	bolt m36	bolt m42	bolt m48
Thread pitch	large	1	1,25	1,5	1,75	2		2,5			3		3,5	4	4,5	5
Thread pitch	small	—	1	1,25		1,5					2			3
Rod diameter d1		6	8	10	12	14	16	18	20	22	24	27	30	36	42	48
Turnkey size S		10	13	17	19	21	24	27	30	34	36	41	46	55	65	75
Head height k		4,0	5,3	6,4	7,5	8,8	10,0	12,0	12,5	14,0	15,0	17,0	18,7	22,5	26,0	30,0
Diameter of circumscribed circle e, not less		10,9	14,2	17,6	19,9	22,8	26,2	29,6	33,0	37,3	39,6	45,2	50,9	60,8	71,3	82,6
dw, no less		8,7	11,5	14,5	16,5	19,2	22,0	24,8	27,7	31,4	33,2	38,0	42,7	51,1	59,9	69,4
hw	no less	0,15					0,20								0,25
hw	no more	0,6					0,8
Diameter of hole in rod d3		1,6	2,0	2,5	3,2		4,0			5,0			6,3		8,0
Diameter of the hole in the head d4Н15		2,0	2,5		3,2		4,0							5,0
Distance from the supporting surface to the axis of the hole in the head l2js15		2,0	2,8	3,5	4,0	4,5	5,0	6,0	6,5	7,0	7,5	8,5	9,5	11,5	13,0	15,0

Note: The bolt sizes shown in parentheses are not recommended.

Bolt drawing 7798:

The conversion of bolts from pieces to kilograms is given in Table 2.

table 2

Bolt length, mm	Theoretical weight 1000 pcs. bolts kg" with nominal thread diameter d, mm
Bolt length, mm	bolt m6	M8 bolt	M10 bolt	M12 bolt	bolt m14	M16 bolt	bolt m18	M20 bolt	bolt m22	bolt m24	bolt m27	bolt m30	bolt m36	bolt m42	bolt m48
8	4,306	8,668	—	—	—	—	—	—	—	—	—	—	—	—	—
10	4,712	9,394	16,68	—	—	—	—	—	—	—	—	—	—	—	—
12	5,118	10,120	17,82	—	—	—	—	—	—	—	—	—	—	—	—
14	5,524	10,850	18,96	27,89	—	—	—	—	—	—	—	—	—	—	—
16	5,930	11,570	20,10	29,48	43,98	—	—	—	—	—	—	—	—	—	—
18	6,336	12,300	21,23	31,12	46,21	65,54	—	—	—	—	—	—	—	—	—
20	6,742	13,020	22,37	32,76	48,45	68,49	95,81	—	—	—	—	—	—	—	—
22	7,204	13,520	23,51	34,40	50,69	71,44	99,52	—	—	—	—	—	—	—	—
25	7,871	14,840	25,22	36,86	54,05	75,87	105,10	133,3	—	—	—	—	—	—	—
28	8,537	16,330	26,92	39,32	57,40	80,29	110,60	140,2	—	—	—	—	—	—	—
30	8,981	17,120	28,52	40,96	59,64	83,24	114,30	144,8	193,0	—	—	—	—	—	—
32	9,426	17,910	29,43	42,59	61,87	86,19	118,00	149,4	198,6	237,0	—	—	—	—	—
35	10,090	19,090	31,28	45,34	65,24	90,62	123,60	156,3	207,0	246,9	340,6	—	—	—	—
38	10,760	20,280	33,18	48,00	68,59	95,04	129,20	163,2	215,4	256,9	353,3	—	—	—	—
40	11,200	21,070	34,36	49,78	71,25	97,99	132,90	167,8	221,0	263,5	361,8	474,8	—	—	—
45	12,310	23,040	37,45	54,22	77,30	105,70	142,10	179,4	235,0	280,1	373,0	500,9	—	—	—
50	13,420	25,020	40,53	58,67	83,35	113,60	152,40	190,9	249,0	296,7	404,1	526,9	834,5	—	—
55	14,530	26,990	43,62	63,11	89,39	121,50	162,40	203,7	263,1	313,3	425,3	553,0	872,1	1304	—
60	15,640	28,970	46,70	67,55	95,44	129,40	172,40	216,0	278,9	329,9	446,5	579,0	909,8	1356	—
65	16,760	30,940	49,79	71,99	101,50	137,30	182,40	228,4	293,8	348,8	467,7	605,1	947,4	1407	2009
70	17,870	32,910	52,87	76,44	107,50	145,20	192,40	240,7	308,8	366,5	491,1	631,1	985,0	1458	2076
75	18,980	34,890	55,96	80,88	113,60	153,10	202,40	253,0	323,7	384,3	513,6	659,7	1023,0	1509	2143
80	20,090	36,860	59,04	85,33	119,60	161,00	212,40	265,0	338,6	402,1	536,1	687,5	1061,0	1561	2211
85	21,200	38,840	62,13	89,77	125,70	168,90	222,40	277,7	353,6	419,8	558,6	715,2	1098,0	1612	2278
90	22,310	40,810	65,21	94,20	131,70	176,80	232,40	290,1	368,5	437,6	581,0	743,0	1141,0	1663	2345
95	—	42,790	68,30	98,64	137,80	184,70	242,40	302,4	383,4	455,4	603,5	770,8	1181,0	1715	2412
100	—	44,760	71,38	103,10	143,80	192,60	252,40	314,7	398,3	473,2	626,0	798,5	1221,0	1766	2479
105	—	—	74,47	107,50	149,90	200,50	262,40	327,1	413,3	490,9	648,5	826,3	1261,0	1826	2546
110	—	—	77,55	112,00	155,90	208,40	272,30	339,4	428,2	508,7	671,0	854,1	1301,0	1880	2614
115	—	—	80,63	116,40	162,00	216,30	282,30	351,8	443,1	526,5	693,5	881,8	1341,0	1934	2690
120	—	—	83,72	120,90	168,00	224,20	292,30	364,1	458,1	544,2	716,0	909,6	1381,0	1989	2760
125	—	—	86,80	125,30	174,00	232,10	302,30	376,4	473,0	562,0	738,5	937,4	1421,0	2043	2831
130	—	—	89,89	129,70	180,10	240,00	312,30	388,8	487,9	579,8	761,0	965,2	1461,0	2098	2903
140	—	—	96,06	138,60	192,20	255,80	332,30	413,5	517,8	615,3	806,0	1021,0	1541,0	2207	3045
150	—	—	102,18	147,50	204,30	271,60	352,30	438,1	547,6	650,8	850,1	1076,0	1621,0	2315	3187
160	—	—	108,38	156,40	216,40	287,40	372,30	462,8	577,5	686,4	895,9	1132,0	1701,0	2424	3329
170	—	—	114,58	165,30	228,50	303,20	392,30	487,5	607,4	721,9	940,9	1188,0	1780,0	2533	3471
180	—	—	120,68	174,20	240,60	319,00	412,30	512,2	637,2	757,5	985,9	1243,0	1860,0	2642	3614
190	—	—	126,88	183,10	252,70	333,80	432,30	536,9	667,1	793,0	1031,0	1299,0	1940,0	2751	3756
200	—	—	133,08	191,90	264,70	350,60	452,20	561,5	697,0	828,6	1076,0	1354,0	2020,0	2860	3898
220	—	—	—	209,70	228,90	382,20	492,20	610,9	756,7	899,6	1166,0	1465,0	2180,0	3077	4182
240	—	—	—	227,50	313,10	413,80	532,20	660,3	816,4	970,8	1256,0	1576,0	2340,0	3295	4466
260	—	—	—	245,20	337,60	445,40	572,20	709,6	876,1	1042,0	1346,0	1687,0	2500,0	3513	4751
280	—	—	—	—	361,50	476,90	612,20	759,0	935,9	1113,0	1436,0	1798,0	2660,0	3730	5035
300	—	—	—	—	385,70	508,50	652,20	808,3	995,6	1184,0	1526,0	1910,0	2820,0	3948	5319

The bolt head options are determined by the bolt manufacturer. The most widely used bolts are M6, M8, M10, M12, M16, M20, type 1. Bolts, type 2 and 3, are usually made to order.

Examples of symbols:

Bolt M12 - 6gx60.58 (S19) GOST 7798-70

Bolt type 1, with thread diameter d=12 mm, turnkey size S=19 mm, length l=60 mm, with large thread pitch, with tolerance range 6g, strength class 5.8, black.

Bolt M10x1.25 - 6gx60.109.40X.016 GOST 7798-70

Bolt version 1, with thread diameter d=10 mm, wrench size S=17 mm, with fine thread pitch 1.25 mm, with tolerance range 6g, strength class 10.9, made of steel grade 40X, coated type 01, 6 microns thick. (bolt galvanized)

Bolt M16 - 6gx60.58 (S24) GOST 7798-70

Bolt version 1, with thread diameter d=16 mm, wrench size S=24 mm, length l=60 mm, with large thread pitch with tolerance range 6g, strength class 5.8, black uncoated.

Bolt M16x1.5 - 6gx60.109.40X.016 GOST 7798-70

Bolt version 1, with thread diameter d=16 mm, wrench size S=24 mm, length 60 mm, with fine thread pitch with tolerance range 6g, strength class 10.9, made of steel grade 40X, with zinc coating thickness 6 µm.

Bolt 2M20 - 6gx60.58 (S30) GOST 7798-70

Bolt version 2, with thread diameter d=20 mm, turnkey size S=30 mm, length l=60 mm, with large thread pitch, with tolerance range 6g, strength class 5.8, uncoated.

You can find out prices and place an order for these products in bulk from one box from our managers.

Material of manufacture

The technology for producing bolts characterized by strength class 6.8 is the so-called.
volumetric stamping using upsetting presses. quality carbon structural steel, mainly grades St.35 and St.45, is used as raw material The following properties of this material contribute to this choice:

the value of the HB index (Brinell hardness) ranges from 181 to 238 units;
the yield strength is 480 MPa;
ultimate strength – 600 MPa.

The use of steels of other grades is allowed. Instead of

Article 35 – Article 30, Article 40 and Article 35g;
Art.45 – Art.50G2, Art.40X.

Specifications

Manufacturers of bolts with strength corresponding to class 6.8 must comply with the dimensions established by domestic standards. Since GOST 7805, from the point of view of dimensional characteristics, is an expanded version of GOST 7798, we present their values prescribed in the first of these regulatory documents.

Parameter	Thread pitch		S	k	e, no less	dw	hw		d3	d4	L2
Parameter	Melk.	Large	S	k	e, no less	dw	Not less	Not more	d3	d4	L2
M48	3	5	75	30	83,9	70,5	0,25	0,8	8	5	15
M42		4,5	65	26	72,6	61	0,25		8		13
M36		4	55	22,5	61,3	51,1	0,2		6,3		11
M30	2	3,5	46	18,7	51,3	42,7			6,3	4	9,5
M27		3	41	17	45,6	38			5		8,5
M24		3	36	15	40	33,6					8
M22	1,5	2,5	34	14	37,7	31,7					7,5
M20			30	12,5	33,5	28,2			4		7,
M18			27	12	30,1	25,3					6,5
M16		2	24	10	26,8	22,5					6
M14		2	21	8,8	23,4	19,6	0,15	0,6	3,2	3,2	4,5
M12	1,25	1,75	18	7,5	20	16,6			3,2	3,2	4
M10	1,25	1,5	16	6,4	17,8	14,6			2,5	2,5	3,5
M8	1	1,25	13	5,3	14,4	11,6			2	2,5	2,8
M6		1	10	4	11,1	8,9		0,5	1,6	2	2
M5		0,8	8	3,5	8,8	6,9		0,5	1,2	1,2	1,8
M4		0,7	7	2,8	7,7	5,9		0,4	1	1	1,4
M3.5		0,6	6	2,4	6,6	5,1			—	—	—
M3		0,5	5,5	2,0	6	4,6
M2.5		0,45	5	1,7	5,5	4,1	——	——
M2		0,4	4	1,4	4,3	3,1
M1.6		0,35	3,2	1,1	3,4	2,3

Designations are taken from the drawings of bolt options.

Not Found

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5. Bolts of accuracy class A

Hex head bolts - GOST 7805-70; bolts with hexagonal reduced head - GOST 7808-70. Dimensions, mm

GOST 7805-70

Version 1

Version 3

D » 0.95S. Thread diameter d = 1.6 ... 48 mm

GOST 7808-70

Version 1

Version 3

D » 0.95S. Thread diameter d = 8 ... 48 mm The length of bolts ℓ and thread b is given in table. 7 and 8.

Thread d = d1		1,6	2	2,5	3	4	5	6	8	10	12	16	20	24	30	36	42	48
Thread pitch	large	0,35	0,4	0,45	0,5	0,7	0,8	1	1,25	1,5	1,75	2	2,5	3	3,5	4	4,5	5
Thread pitch	small	—	—	—	—	—	—	—	1	1,25	1,25	1,5	1,5	2	2	3	3	3
Deviations d1		-0,14				-0,18			-0,22		-0,27		-0,33			-0,39
Key size S		3,2	4	5	5,5	7	8	10	13	16	18	24	30	36	46	55	65	75
Deviation		-0,18				-0,22			-0,27		-0,33			-0,62		-0,74
Wrench size S1		—	—	—	—	—	—	—	12	14	17	22	27	32	41	50	60	70
Deviation		—	—	—	—	—	—	—	-0,27			-0,33			-0,62		-0,74
Head height k		1,1	1,4	1,7	2	2,8	3,5	4	5,5	7	8	10	13	15	19	23	26	30
Deviation		±0,12					±0,15			±0,18			±0,21		±0,26
Head height k1		—	—	—	—	—	—	—	5	6	7	9	11	13	17	20	23	26
Deviation		—	—	—	—	—	—	—	±0,15		±0,18		±0,21			±0,26
Diameter of circumscribed circle, not less than:	e	3,4	4,3	5,5	6,0	7,7	8,8	11,1	14,4	17,8	20,0	26,8	33,5	40,0	51,3	61,7	72,6	83,9
Diameter of circumscribed circle, not less than:	e1	—	—	—	—	—	—	—	13,2	15,5	18,9	24,5	30,1	35,7	45,6	55,8	67,0	78,3
Head hole diameter d2		—				1,0	1,2	2,0	2,5	2,5	3,2	4	4	4	4	5	5	5
Deviation		—				+0,40					+0,48
ℓ1		—				1,4	1,8	2,0	2,8	3,5	4	5	6,5	7,5	9,5	11,5	13	15
Deviation		—				±0,20				±0,24			±0,29			±0,35
Displacement of the head axis relative to the rod axis	according to GOST 7805-70	0,18				0,22 —			0,27		0,33			0,39		0,46
Displacement of the head axis relative to the rod axis	according to GOST 7808-70	0,18				0,22 —			0,27			0,33		0,39			0,46

GOSTs also provide for other designs, design options and non-recommended diameters and lengths of bolts. Example of a bolt designation

version 1, thread diameter d = 12 mm, wrench size S = 18 mm, length ℓ = 60 mm with large thread pitch, tolerance range 6g, strength class 5.8, uncoated:

Bolt M12-6g x 60.58 (S18) GOST 7805-70

the same version 3, with wrench size S = 19 mm, with fine thread pitch, tolerance range 6g, strength class 10.9, made of steel 40X, with coating 01 6 microns thick:

Bolt ZM12 x 1.25 - 6g x 60.109.40X.016 GOST 7808-70

Thread - according to GOST 24705-81. Runaway and undercut threads - according to GOST 10549-80. It is allowed, by agreement between the manufacturer and the consumer, to produce bolts with a thread pitch of 2 mm for nominal diameters of 36 - 48 mm. According to GOST 7808-70, it is allowed to manufacture bolts of version 1 with a head height equal to k. Technical requirements - according to GOST 1759.0-87.

6. Bolts of accuracy class B

Bolts with hexagonal head - GOST 7798-70, bolts with hexagonal reduced head - GOST 7796-70. Dimensions, mm

GOST 7798-70

Version 1

Version 3

D » 0.95S. Thread diameter d = 6 ... 48 mm

GOST 7796-70

Version 1

Version 3

D » 0.95S1. Thread diameter d = 8 ... 48 mm

Thread d = d1		6	8	10	12	16	20	24		30	36	42	48
Thread pitch	large	1	1,25	1,5	1,75	2,0	2,5	3		3,5	4,0	4,5 3	5,0
	small	—	1,0	1,25		1,5		2			3
Deviations d1		-0,30	-0,36		-0,43		-0,52				-0,62
Key size S		10	13	16	18	24	30	36		46	55	65	75
Deviation		-0,36	-0,43		-0,52	-0,84		-1,0			-1,2	-1,9
Wrench size S1		—	12	14	17	22	27	32		41	50	60	70
Deviation		—	-0,43			-0,84		-1,0				-1,2	-1,9
Head height k		4	5,5	7	8	10	13	15		19	23	25	30
Deviation		±0,24		±0,29			±0,35			±0,42
Head height k1		—	5	6	7	9	11	13		17	20	23	26
Deviation		—	±0,24		±0,29		±0,35				±0,42
Diameter of circumscribed circle, not less than:	e	10,9	14,2	17,6	19,9	26,2	33,0	39,6		50,9	60,8	71,3	82,6
	e1	—	13,1	15,3	18,7	23,9	29,6	35,0		45,2	55,4	66,4	76,9
Head hole diameter d2		2	2,5		3,2	4					5
Deviation		+0,4			+0,48
ℓ1		2	2,8	3,5	4	5	6,5	7,5		9,5	11,5	13	15
Deviation		±0,2		±0,24			±0,29				±0,35
Displacement of the head axis relative to the rod axis	according to GOST 7798-70	0,36	0,43		0,52			0,62			0,74
	according to GOST 7796-70	—	0,43			0,52			0,62		0,74

GOSTs provide for other designs, design options and non-recommended bolt diameters and lengths. Bolts for which the thread length b (the table is located above the broken line) may be manufactured with a thread length up to the head: this assumption applies only to bolts in accordance with GOST 7798-70 and GOST 7796-70. An example of a bolt designation

version 1, thread diameter d = 12 mm, wrench size S = 18 mm, length ℓ = 60 mm with large thread pitch, tolerance range 6g, strength class 5.8. without cover:

Bolt M12-6g x 60.58 (S18) GOST 7798-70

the same version 3, with a spanner size S = 19 mm, with a fine thread pitch, with a tolerance range of 6g, strength class 10.9, made of steel 40X, with a coating 01 6 microns thick:

Bolt ZM12 x 1.25 - 6g x 60.109.40X.016 GOST 7796-70

Thread - according to GOST 24705-81. Runaway and undercut threads - according to GOST 27148-86. By agreement with the manufacturer, it is possible to produce bolts with a tolerance range of 4h, 6e and 6d. According to GOST 7796-70, it is allowed to produce bolts of version 1 with a head height equal to k. Technical requirements - according to GOST 1759.0-87.

7. Lengths of bolts ℓ and threads b at d = 1.6 - 5 mm (GOST 7805-70)

Dimensions, mm

ℓ	b* at d						ℓ	b* at d
	1,6	2	2,5	3	4	5		1,6	2	2,5	3	4	5
2 3	X	—	—	— —	— —	— —	4 5 6	X	X	X	X	— — X	— — X
		X	X
8 10	X	X	X	X	X	X	35 40 45 50	—	—	—	—	14	16
12 14 16	9 —	X 10 10	X 11 11	X 12 12	X 14 14	X 16 16
20 25	—	—	11	12	14	16	55 60 65 70 75					14 14 — — — —
30	—	—	—	12	14	16

* The x marks mark bolts with threads along the entire length of the rod. The length for bolts d over 5 mm is given in table. 8.

8. Bolt lengths ℓ and thread b (GOST 7798-70, 7796-70, 7808-70, 7805-70*)

Dimensions, mm

ℓ	Thread length b at d (x marks bolts with threads along the entire length)
	6	8	10	12	16	20	24	30	36	42	48
8 10 12 14 16 20 25 30 35	XXXXXX 18 18 18	XXXXXXX 22 22	— XXXXXXX 26 26	— — — XXXXX 30 30 30	— — — — — XXXXX 38 38 38	— — — — — — XXXXXX 46 46	— — — — — — — — XXXXXX 54	—	—	—	—
40	18	22						XXXXXXX 66 66	— — XXXXXXX	— — — XXXXXX	— — — — — XXXX
45			26
50 55				30
60					38
65						46
70 75							54
80
90	18	22	26	30	38	46	54	66	78 78 78	XX 90	XXX
100	—
110		—
120 130 140 150									78	90	102
160 170 180 190 200			32	36	44	52	60	72	84	96	108
220 240 260			—
280 300				—

For GOST 7805-70, bolt lengths at d = 1.6 ... 5 mm in table. 7

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Similarities and differences between DIN 931 and DIN933 standards

Standards DIN 931 and DIN 933 are the closest analogues of GOST 7805 and GOST 7798, respectively. However, there is one important aspect here. As you know, each domestic standard normalizes the production of bolts of only one precision level. So, the first of the above is valid for class “A” fasteners, and the second is for fasteners made with accuracy corresponding to class “B”. In German regulatory documents the situation in this regard is somewhat different.

The requirement to produce bolts with accuracy class “A” applies to products with threads up to M24 and a length not exceeding 150 mm.
The dimensional characteristics of such fasteners must meet the requirements of class “B” if their thread diameter is greater than M24 and their length exceeds 150 mm.

There are also differences in the limit values of the thread diameter. It was said above that GOST 7805 has more nomenclature items compared to GOST 7798 due to the addition of seven diameters, the size of which is less than 6 mm (minimum -1.6 mm). And the upper values of this indicator are identical – M48.

In German standards, everything looks exactly the opposite. That is, the minimum thread there is the same - M1.6, but the maximum is different. In DIN 931 it is M39, and in DIN 933 it is M52. Accordingly, all maximum values of other parameters, starting from the height of the head and ending with the holes in the rod, also differ.

GOST 7798-70 Hex head bolts, accuracy class B. Design and dimensions

STATE STANDARD OF THE USSR UNION

HEX BOLTS, ACCURACY GRADE B

Construction
and dimensions
Hexagon bolts, product grade B. Construction and dimensions

GOST 7798-70

(ST SEV 4728-84)

Date of introduction 01/01/72

1 . This standard applies to hex head bolts of accuracy class B with thread diameters from 6 to 48 mm.

The standard fully complies with ST SEV 4728-84.

(Changed edition, Amendment No. 4).

2. The design and dimensions of the bolts must correspond to those indicated in the drawing and table. 12 .

(Changed edition, Amendment No. 2 - 6).

3. Thread - according to GOST 24705. Runaway and undercut threads - according to GOST 27148. The ends of the bolts are in accordance with GOST 12414.

(Changed edition, Amendment No. 5).

3 a. The radius under the head is according to GOST 24670.

3 b. Tolerances of dimensions, deviations in shape and location of surfaces and control methods not established by this standard are in accordance with GOST 1759.1.

3rd century Allowable bolt surface defects and control methods are in accordance with GOST 1759.2.

3a - 3c. (Introduced additionally, Amendment No. 4).

4 . (Deleted, Amendment No. 4).

5 . The head design options are determined by the manufacturer.

5 a. It is allowed to produce bolts with a diameter of the smooth part of the rod d

1 approximately equal to the average thread diameter.

(Introduced
additionally, Amendment No. 3 ).
5 B. To apply markings, it is allowed to manufacture bolts of versions 1 and 2 with a hole on the end surface of the head with dimensions that do not reduce the strength of the head, while the depth of the hole should be no more than 0.4 k

(Introduced
additionally, Amendment No. 5 ).
6. Technical requirements - according to GOST 1759.0.

7 . (Deleted, Amendment No. 2).

8 . The weight of the bolts is indicated in Appendix 1.

Table 1

Nominal thread diameter, d		6	8	10	12	(14)	16	(18)	20	(22)	24	(27)	30	36	42	48
Thread pitch	large	1	1 ,25	1 ,5	1 ,75	2		2 ,5			3		3 ,5	4	4 ,5	5
Thread pitch	small	—	1	1 ,25		1 ,5					2			3
Rod diameter d 1		6	8	10	12	14	16	18	20	22	24	27	30	36	42	48
Turnkey size S		10	13	16	18	21	24	27	30	34	36	41	46	55	65	75
Head height k		4 ,0	5 ,3	6 ,4	7 ,5	8 ,8	10 ,0	12 ,0	12 ,5	14 ,0	15 ,0	17 ,0	18 ,7	22 ,5	26 ,0	30 ,0
Circumcircle diameter e , no less		10 ,9	14 ,2	17 ,6	19 ,9	22 ,8	26 ,2	29 ,6	33 ,0	37 ,3	39 ,6	45 ,2	50 ,9	60 ,8	71 ,3	82 ,6
d w, not less		8 ,7	11 ,5	14 ,5	16 ,5	19 ,2	22 ,0	24 ,8	27 ,7	31 ,4	33 ,2	38 ,0	42 ,7	51 ,1	59 ,9	69 ,4
h w	no less	0 ,15					0 ,20								0 ,25
h w	no more	0 ,6					0 ,8
Rod hole diameter d 3		1 ,6	2 ,0	2 ,5	3 ,2		4 ,0			5 ,0			6 ,3		8 ,0
Head hole diameter d 4 H15		2 ,0	2 ,5		3 ,2		4 ,0							5 ,0
Distance from the supporting surface to the axis of the hole in the head l 2 js15		2 ,0	2 ,8	3 ,5	4 ,0	4 ,5	5 ,0	6 ,0	6 ,5	7 ,0	7 ,5	8 ,5	9 ,5	11 ,5	13 ,0	15 ,0

Notes:

1. Bolt sizes enclosed in brackets are not recommended.

2. It is allowed to manufacture bolts with the dimensions specified in Appendix 2.

table 2

Bolt length, l	Thread length b and the distance from the supporting surface of the head to the axis of the hole in the rod l 1 with a nominal thread diameter d (the sign ´ marks threaded bolts along the entire length of the rod)
	6		8		10		12		(14)		16		(18)		20		(22)		24		(27)		30		36		42		48
	l 1	b	l 1	b	l 1	b	l 1	b	l 1	b	l 1	b	l 1	b	l 1	b	l 1	b	l 1	b	l 1	b	l 1	b	l 1	b	l 1	b	l 1	b
8	—	´	—	´	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
10	—	´	—	´	—	´	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
12	—	´	—	´	—	´	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
14	10	´	—	´	—	´	—	´	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
16	12	´	12	´	—	´	—	´	—	´	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
(18)	14	´	14	´	14	´	—	´	—	´	—	´	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
20	16	´	16	´	16	´	15	´	—	´	—	´	—	´	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
(22)	18	18	18	´	18	´	17	´	17	´	—	´	—	´	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
25	21	18	21	´	21	´	20	´	20	´	19	´	—	´	—	´	—	—	—	—	—	—	—	—	—	—	—	—	—	—
(28)	24	18	24	22	24	´	23	´	23	´	22	´	22	´	—	´	—	´	—	—	—	—	—	—	—	—	—	—	—	—
30	26	18	26	22	26	´	25	´	25	´	24	´	24	´	24	´	—	´	—	—	—	—	—	—	—	—	—	—	—	—
(32)	28	18	28	22	28	26	27	´	27	´	26	´	26	´	26	´	25	´	—	´	—	—	—	—	—	—	—	—	—	—
35	31	18	31	22	31	26	30	30	30	´	29	´	29	´	29	´	28	´	28	´	—	´	—	—	—	—	—	—	—	—
(38)	34	18	34	22	34	26	33	30	33	´	32	´	32	´	32	´	31	´	31	´	—	´	—	—	—	—	—	—	—	—
40	36	18	36	22	36	26	35	30	35	34	34	´	34	´	34	´	33	´	33	´	32	´	—	´	—	—	—	—	—	—
45	41	18	41	22	41	26	40	30	40	34	39	38	39	´	39	´	38	´	38	´	37	´	36	´	—	—	—	—	—	—
50	46	18	46	22	46	26	45	30	45	34	44	38	44	42	44	´	43	´	43	´	42	´	41	´	40	´	—	—	—	—
55	51	18	51	22	51	26	50	30	50	34	49	38	49	42	49	46	48	´	48	´	47	´	46	´	45	´	—	´	—	—
60	56	18	56	22	56	26	55	30	55	34	54	38	54	42	54	46	53	50	53	´	52	´	51	´	50	´	48	´	—	—
65	61	18	61	22	61	26	60	30	60	34	59	38	59	42	59	46	58	50	58	54	57	´	56	´	55	´	53	´	—	—
70	66	18	66	22	66	26	65	30	65	34	64	38	64	42	64	46	63	50	63	54	62	60	61	´	60	´	58	´	58	´
75	71	18	71	22	71	26	70	30	70	34	69	38	69	42	69	46	68	50	68	54	67	60	66	66	65	´	63	´	63	´
80	76	18	76	22	76	26	75	30	75	34	74	38	74	42	74	46	73	50	73	54	72	60	71	66	70	´	68	´	68	´
(85)	81	18	81	22	81	26	80	30	80	34	79	38	79	42	79	46	78	50	78	54	77	60	76	66	75	´	73	´	73	´
90	86	18	86	22	86	26	85	30	85	34	84	38	84	42	84	46	83	50	83	54	82	60	81	66	80	78	78	´	78	´
(95)	—	—	91	22	91	26	90	30	90	34	89	38	89	42	89	46	88	50	88	54	87	60	86	66	85	78	83	´	83	´
100	—	—	96	22	96	26	95	30	95	34	94	38	94	42	94	46	93	50	93	54	92	60	91	66	90	78	88	´	88	´
(105)	—	—	—	—	101	26	100	30	100	34	99	38	99	42	99	46	98	50	98	54	97	60	96	66	95	78	93	90	93	´
110	—	—	—	—	106	26	105	30	105	34	104	38	104	42	104	46	103	50	103	54	102	60	101	66	100	78	98	90	98	´
(115)	—	—	—	—	111	26	110	30	110	34	109	38	109	42	109	46	108	50	108	54	107	60	106	66	105	78	103	90	103	102
120	—	—	—	—	116	26	115	30	115	34	114	38	114	42	114	46	113	50	113	54	112	60	111	66	110	78	108	90	108	102
(125)	—	—	—	—	121	26	120	30	120	34	119	38	119	42	119	46	118	50	118	54	117	60	116	66	115	78	113	90	113	102
130	—	—	—	—	126	32	125	36	125	40	124	44	124	48	124	52	123	56	123	60	122	66	121	72	120	84	118	96	118	108
140	—	—	—	—	136	32	135	36	135	40	134	44	134	48	134	52	133	56	133	60	132	66	131	72	130	84	128	96	128	108
150	—	—	—	—	146	32	145	36	145	40	144	44	144	48	144	52	143	56	143	60	142	66	141	72	140	84	138	96	138	108
160	—	—	—	—	156	32	155	36	155	40	154	44	154	48	154	52	153	56	153	60	152	66	151	72	150	84	148	96	148	108
170	—	—	—	—	166	32	165	36	165	40	164	44	164	48	164	52	163	56	163	60	162	66	161	72	160	84	158	96	158	108
180	—	—	—	—	176	32	175	36	175	40	174	44	174	48	174	52	173	56	173	60	172	66	171	72	170	84	168	96	168	108
190	—	—	—	—	186	32	185	36	185	40	184	44	184	48	184	52	183	56	183	60	182	66	181	72	180	84	178	96	178	108
200	—	—	—	—	196	32	195	36	195	40	194	44	194	48	194	52	193	56	193	60	192	66	191	72	190	84	188	96	188	108
220	—	—	—	—	—	—	215	49	215	57	214	57	214	61	214	65	213	69	213	73	212	79	211	85	210	97	208	109	208	121
240	—	—	—	—	—	—	235	49	235	57	234	57	234	61	234	65	233	69	233	73	232	79	231	85	230	97	228	109	228	121
260	—	—	—	—	—	—	255	49	255	57	254	57	254	61	254	65	254	69	253	73	252	79	251	85	250	97	248	109	248	121
280	—	—	—	—	—	—	—	—	275	57	274	57	274	61	274	65	273	69	273	73	272	79	271	85	270	97	268	109	268	121
300	—	—	—	—	—	—	—	—	295	57	294	57	294	61	294	65	293	69	293	73	292	79	291	85	290	97	288	109	288	121

Notes:

1. Bolts with length dimensions enclosed in brackets are not recommended for use.

b values

located above the broken line, it is allowed to be manufactured with a thread length up to the head.

An example of a symbol for a bolt of version 1 with thread diameter d

= 12 mm, with a turnkey size
S
= 18 mm, length
l
= 60 mm, with a large thread pitch with a tolerance range of 6g, strength class 5.8, uncoated:

Bolt
M 12
-
6 g
´
60
.
58
(
S18
)
GOST 7798-70
The same, version 2, with turnkey size S

= 19 mm, with a fine thread pitch with a tolerance range of 6 g, strength class 10.9, made of steel grade 40X, with a 01 coating 6 microns thick:

Bolt
2 M12
´
1
,
25
-
6 g
´
60
.
109
.
40X
.
016 GOST 7798-70
Reference

Bolt length l , mm	Theoretical weight 1000 pcs. bolts, kg ", with nominal thread diameter d , mm
Bolt length l , mm	6	8	10	12	14	16	18	20	22	24	27	30	36	42	48
8	4 ,306	8 ,668	—	—	—	—	—	—	—	—	—	—	—	—	—
10	4 ,712	9 ,394	16 ,68	—	—	—	—	—	—	—	—	—	—	—	—
12	5 ,118	10 ,120	17 ,82	—	—	—	—	—	—	—	—	—	—	—	—
14	5 ,524	10 ,850	18 ,96	27 ,89	—	—	—	—	—	—	—	—	—	—	—
16	5 ,930	11 ,570	20 ,10	29 ,48	43 ,98	—	—	—	—	—	—	—	—	—	—
18	6 ,336	12 ,300	21 ,23	31 ,12	46 ,21	65 ,54	—	—	—	—	—	—	—	—	—
20	6 ,742	13 ,020	22 ,37	32 ,76	48 ,45	68 ,49	95 ,81	—	—	—	—	—	—	—	—
22	7 ,204	13 ,520	23 ,51	34 ,40	50 ,69	71 ,44	99 ,52	—	—	—	—	—	—	—	—
25	7 ,871	14 ,840	25 ,22	36 ,86	54 ,05	75 ,87	105 ,10	133 ,3	—	—	—	—	—	—	—
28	8 ,537	16 ,330	26 ,92	39 ,32	57 ,40	80 ,29	110 ,60	140 ,2	—	—	—	—	—	—	—
30	8 ,981	17 ,120	28 ,52	40 ,96	59 ,64	83 ,24	114 ,30	144 ,8	193 ,0	—	—	—	—	—	—
32	9 ,426	17 ,910	29 ,43	42 ,59	61 ,87	86 ,19	118 ,00	149 ,4	198 ,6	237 ,0	—	—	—	—	—
35	10 ,090	19 ,090	31 ,28	45 ,34	65 ,24	90 ,62	123 ,60	156 ,3	207 ,0	246 ,9	340 ,6	—	—	—	—
38	10 ,760	20 ,280	33 ,18	48 ,00	68 ,59	95 ,04	129 ,20	163 ,2	215 ,4	256 ,9	353 ,3	—	—	—	—
40	11 ,200	21 ,070	34 ,36	49 ,78	71 ,25	97 ,99	132 ,90	167 ,8	221 ,0	263 ,5	361 ,8	474 ,8	—	—	—
45	12 ,310	23 ,040	37 ,45	54 ,22	77 ,30	105 ,70	142 ,10	179 ,4	235 ,0	280 ,1	373 ,0	500 ,9	—	—	—
50	13 ,420	25 ,020	40 ,53	58 ,67	83 ,35	113 ,60	152 ,40	190 ,9	249 ,0	296 ,7	404 ,1	526 ,9	834 ,5	—	—
55	14 ,530	26 ,990	43 ,62	63 ,11	89 ,39	121 ,50	162 ,40	203 ,7	263 ,1	313 ,3	425 ,3	553 ,0	872 ,1	1304	—
60	15 ,640	28 ,970	46 ,70	67 ,55	95 ,44	129 ,40	172 ,40	216 ,0	278 ,9	329 ,9	446 ,5	579 ,0	909 ,8	1356	—
65	16 ,760	30 ,940	49 ,79	71 ,99	101 ,50	137 ,30	182 ,40	228 ,4	293 ,8	348 ,8	467 ,7	605 ,1	947 ,4	1407	2009
70	17 ,870	32 ,910	52 ,87	76 ,44	107 ,50	145 ,20	192 ,40	240 ,7	308 ,8	366 ,5	491 ,1	631 ,1	985 ,0	1458	2076
75	18 ,980	34 ,890	55 ,96	80 ,88	113 ,60	153 ,10	202 ,40	253 ,0	323 ,7	384 ,3	513 ,6	659 ,7	1023 ,0	1509	2143
80	20 ,090	36 ,860	59 ,04	85 ,33	119 ,60	161 ,00	212 ,40	265 ,0	338 ,6	402 ,1	536 ,1	687 ,5	1061 ,0	1561	2211
85	21 ,200	38 ,840	62 ,13	89 ,77	125 ,70	168 ,90	222 ,40	277 ,7	353 ,6	419 ,8	558 ,6	715 ,2	1098 ,0	1612	2278
90	22 ,310	40 ,810	65 ,21	94 ,20	131 ,70	176 ,80	232 ,40	290 ,1	368 ,5	437 ,6	581 ,0	743 ,0	1141 ,0	1663	2345
95	—	42 ,790	68 ,30	98 ,64	137 ,80	184 ,70	242 ,40	302 ,4	383 ,4	455 ,4	603 ,5	770 ,8	1181 ,0	1715	2412
100	—	44 ,760	71 ,38	103 ,10	143 ,80	192 ,60	252 ,40	314 ,7	398 ,3	473 ,2	626 ,0	798 ,5	1221 ,0	1766	2479
105	—	—	74 ,47	107 ,50	149 ,90	200 ,50	262 ,40	327 ,1	413 ,3	490 ,9	648 ,5	826 ,3	1261 ,0	1826	2546
110	—	—	77 ,55	112 ,00	155 ,90	208 ,40	272 ,30	339 ,4	428 ,2	508 ,7	671 ,0	854 ,1	1301 ,0	1880	2614
115	—	—	80 ,63	116 ,40	162 ,00	216 ,30	282 ,30	351 ,8	443 ,1	526 ,5	693 ,5	881 ,8	1341 ,0	1934	2690
120	—	—	83 ,72	120 ,90	168 ,00	224 ,20	292 ,30	364 ,1	458 ,1	544 ,2	716 ,0	909 ,6	1381 ,0	1989	2760
125	—	—	86 ,80	125 ,30	174 ,00	232 ,10	302 ,30	376 ,4	473 ,0	562 ,0	738 ,5	937 ,4	1421 ,0	2043	2831
130	—	—	89 ,89	129 ,70	180 ,10	240 ,00	312 ,30	388 ,8	487 ,9	579 ,8	761 ,0	965 ,2	1461 ,0	2098	2903
140	—	—	96 ,06	138 ,60	192 ,20	255 ,80	332 ,30	413 ,5	517 ,8	615 ,3	806 ,0	1021 ,0	1541 ,0	2207	3045
150	—	—	102 ,18	147 ,50	204 ,30	271 ,60	352 ,30	438 ,1	547 ,6	650 ,8	850 ,1	1076 ,0	1621 ,0	2315	3187
160	—	—	108 ,38	156 ,40	216 ,40	287 ,40	372 ,30	462 ,8	577 ,5	686 ,4	895 ,9	1132 ,0	1701 ,0	2424	3329
170	—	—	114 ,58	165 ,30	228 ,50	303 ,20	392 ,30	487 ,5	607 ,4	721 ,9	940 ,9	1188 ,0	1780 ,0	2533	3471
180	—	—	120 ,68	174 ,20	240 ,60	319 ,00	412 ,30	512 ,2	637 ,2	757 ,5	985 ,9	1243 ,0	1860 ,0	2642	3614
190	—	—	126 ,88	183 ,10	252 ,70	333 ,80	432 ,30	536 ,9	667 ,1	793 ,0	1031 ,0	1299 ,0	1940 ,0	2751	3756
200	—	—	133 ,08	191 ,90	264 ,70	350 ,60	452 ,20	561 ,5	697 ,0	828 ,6	1076 ,0	1354 ,0	2020 ,0	2860	3898
220	—	—	—	209 ,70	228 ,90	382 ,20	492 ,20	610 ,9	756 ,7	899 ,6	1166 ,0	1465 ,0	2180 ,0	3077	4182
240	—	—	—	227 ,50	313 ,10	413 ,80	532 ,20	660 ,3	816 ,4	970 ,8	1256 ,0	1576 ,0	2340 ,0	3295	4466
260	—	—	—	245 ,20	337 ,60	445 ,40	572 ,20	709 ,6	876 ,1	1042 ,0	1346 ,0	1687 ,0	2500 ,0	3513	4751
280	—	—	—	—	361 ,50	476 ,90	612 ,20	759 ,0	935 ,9	1113 ,0	1436 ,0	1798 ,0	2660 ,0	3730	5035
300	—	—	—	—	385 ,70	508 ,50	652 ,20	808 ,3	995 ,6	1184 ,0	1526 ,0	1910 ,0	2820 ,0	3948	5319

(Changed edition
, Amendment No. 5)
Reference

Dimensions in mm

Nominal thread diameter d			10	12	12	22
Turnkey size S			17	19	22	32
Circumcircle diameter e , no less			18 ,7	20 ,9	23 ,9	35 ,0
d w, not less			15 ,5	17 ,2	20 ,1	29 ,5
Bolt length l	10	Theoretical weight 1000 pcs. bolts (version 1) with coarse thread pitch, kg »	18 ,10	—	—	—
	12		19 ,24	—	—	—
	14		20 ,38	29 ,75	—	—
	16		21 ,52	31 ,34	46 ,52	—
	18		22 ,65	32 ,98	48 ,75	—
	20		23 ,79	34 ,62	50 ,09	—
	22		24 ,93	36 ,26	53 ,23	—
	25		26 ,64	38 ,72	56 ,59	—
	28		28 ,34	41 ,18	59 ,94	—
	30		29 ,48	42 ,82	62 ,18	180 ,6
	32		30 ,85	44 ,45	64 ,41	186 ,2
	35		32 ,70	47 ,20	67 ,78	194 ,6
	38		34 ,55	49 ,86	71 ,13	203 ,0
	40		35 ,78	51 ,64	73 ,79	208 ,6
	45		38 ,87	56 ,08	79 ,84	222 ,6
	50		41 ,95	60 ,53	85 ,89	236 ,6
	55		45 ,04	64 ,97	91 ,93	250 ,7
	60		48 ,12	69 ,41	97 ,98	266 ,5
	65		51 ,21	73 ,85	104 ,00	281 ,4
	70		54 ,29	78 ,30	110 ,00	296 ,4
	75		57 ,38	82 ,74	116 ,10	311 ,3
	80		60 ,46	87 ,19	122 ,10	326 ,2
	85		63 ,55	91 ,63	128 ,20	341 ,2
	90		66 ,63	96 ,06	134 ,20	356 ,1
	95		69 ,72	100 ,50	140 ,30	371 ,0
	100		72 ,80	105 ,00	146 ,30	385 ,9
	105		75 ,89	109 ,40	152 ,40	400 ,9
	110		78 ,97	113 ,90	158 ,40	415 ,8
	115		82 ,05	118 ,30	164 ,50	430 ,7
	120		85 ,14	122 ,80	170 ,50	445 ,7
	125		88 ,22	127 ,20	176 ,50	460 ,6
	130		91 ,31	131 ,60	182 ,60	475 ,5
	140		97 ,48	140 ,50	194 ,70	505 ,4
	150		103 ,60	149 ,40	206 ,80	535 ,2
	160		109 ,80	158 ,30	218 ,90	565 ,1
	170		116 ,00	167 ,20	231 ,00	595 ,0
	180		122 ,10	176 ,10	243 ,10	624 ,7
	190		128 ,30	185 ,00	255 ,20	654 ,7
	200		134 ,50	193 ,80	267 ,20	684 ,6
	220		—	211 ,60	291 ,40	744 ,3
	240		—	229 ,40	315 ,60	804 ,0
	260		—	247 ,10	339 ,80	863 ,7
	280		—	—	364 ,00	923 ,5
	300		—	—	388 ,20	983 ,2

APPENDIX
2
.
(Introduced additionally , Amendment No. 5 ; amended edition , Amendment No. 6).
INFORMATION DATA

1
.
DEVELOPED AND INTRODUCED by the USSR Ministry of Ferrous Metallurgy DEVELOPERS

I. N. Nedoviziy,

Ph.D.
tech. sciences; B. M. Rigmant;
IN AND. Mokrinsky, Ph.D. tech. sciences

2
.
APPROVED AND ENTERED INTO EFFECT by Resolution of the Committee of Standards, Measures and Measuring Instruments under the Council of Ministers of the USSR dated 04.03.70 No. 270 3
.
The standard fully complies with ST SEV 4728-84 4
.
INSTEAD GOST 7798-62 5
. REFERENCE REGULATIVE AND TECHNICAL DOCUMENTS

Designation of the referenced technical document	Item number	Designation of the referenced technical document	Item number
GOST 1759.0-87	6	GOST 24670-81	3a
GOST 1759.1-82	3b	GOST 24705-81	3
GOST 1759.2-82	3v	GOST 27148-86	3
GOST 12414-66	3

6
.
The validity period was lifted according to Protocol No. 5-94 of the Interstate Council for Standardization, Metrology and Certification (IUS 11-12-94) 7
. REISSUE with Amendments No. 2, 3, 4, 5, 6, approved in February 1974, March 1981, March 1985, March 1989, July 1995 (IUS 3-74, 6-81 , 6-85, 6-89, 9-95)