GOST 22353-77 High-Strength Bolts, Product Grade B

High-strength bolts, product grade B, per GOST 22353-77 are steel hex head bolts intended for steel building structures, including bridge structures, as well as for metal structures in heavy machinery.

The design and dimensions of the bolts must conform to the drawing and the tables below.

Table 1

mm

Nominal thread diameter d	16	(18)	20	(22)	24	(27)	30	36	42	48
Thread pitch	2	2.5			3		3.5	4	4.5	5
Shank diameter d₁	16	18	20	22	24	27	30	36	42	48
Width across flats S	27	30	32	36	41	46		55	65	75
Head height K	12.0	13.0	14.0	15.0	17.0	19.0		23.0	26.0	30.0
Circumscribed circle diameter e, min	29.9	33.3	35.0	39.6	45.2	50.9		60.8	72.1	83.4
Radius under the head r	From 1.5 to 2.0			From 2.0 to 2.5			From 3.0 to 4.0			From 4.0 to 5.0

Note. Dimensions in brackets are not recommended for use.

Table 2

mm

Nominal length	Thread length b at nominal thread diameter d
shank l	16	(18)	20	(22)	24	(27)	30	36	42	48
40	×	-	-
45	38	×	-	-	-
50	38	42	×			-
55	38	42	46	×			-
60	38	42	46	50	×			-
65	38	42	46	50	54
70	38	42	46	50	54	60			-
75	38	42	46	50	54	60	66
80	38	42	46	50	54	60	66			-
85	38	42	46	50	54	60	66
90	38	42	46	50	54	60	66	78
(95)	38	42	46	50	54	60	66	78
100	38	42	46	50	54	60	66	78
(105)	38	42	46	50	54	60	66	78	90
110	38	42	46	50	54	60	66	78	90
(115)	38	42	46	50	54	60	66	78	90
120	38	42	46	50	54	60	66	78	90	102
(125)	38	42	46	50	54	60	66	78	90	102
130	38	42	46	50	54	60	66	78	90	102
140	38	42	46	50	54	60	66	78	90	102
150	38	42	46	50	54	60	66	78	90	102
160; 170; 180; 190; 200; 220; 240; 260; 280; 300	44	48	52	56	60	66	72	84	96	108

Notes:

1. Dimensions in brackets are not recommended for use.

2. The × mark indicates bolts with thread over the entire shank length.

Example of a bolt designation with thread diameter d = 20 mm, tolerance field 6g, length l = 100 mm, minimum tensile strength δ = 1100 MPa (110 kgf/mm²), climatic version U, placement category 1:

Bolt M 20-6g × 100.110 GOST 22353-77

Same, climatic version KhL, placement category 1:

Bolt M 20-6g × 100.110 KhL 1 GOST 22353-77

By agreement between the manufacturer and the customer, bolts with a reduced thread length may be produced.

Thread — per GOST 24705-81.

Dimensions of thread runout, incomplete thread, and chamfers at the thread end — per GOST 10549-80. When the thread is produced by rolling, the end chamfer may be omitted.

The method of thread forming is selected by the manufacturer. By agreement between the manufacturer and the customer, the thread may be produced only by cutting.

The head design variant is determined by the manufacturer.

Tolerances not specified in the drawing and tables, as well as methods for inspecting dimensions and deviations of shape and location of surfaces, are per GOST 1759.1-82.

Surface defects of bolts and inspection methods — per GOST 1759.2-82.

Technical requirements — per GOST 22356-77.

The theoretical mass of the bolts is given in the reference appendix.

Appendix (informative)

Theoretical mass of bolts

Bolt length l, mm	Theoretical mass of 1000 pcs. of bolts, kg ≈, at nominal thread diameter d, mm
	16	(18)	20	(22)	24	(27)	30	36	42	48
40	111
45	118	151
50	126	161	198
55	134	171	211	267
60	141	180	223	282	367
65	149	190	235	297	386
70	157	200	247	312	404	538
75	164	210	259	326	421	560	621
80	172	219	271	341	438	582	648
85	180	229	283	355	456	604	676
90	188	239	295	370	473	627	703	1081
95	195	249	307	384	491	649	730	1120
100	203	258	319	399	508	671	758	1159
105	210	268	331	414	525	693	785	1199	1723
110	218	278	343	428	543	715	812	1238	1776
115	226	288	355	443	560	737	839	1277	8130
120	233	297	367	457	578	759	867	1316	1884	2462
125	241	307	379	472	595	781	894	1356	1937	2532
130	249	317	391	487	612	803	921	1395	1991	2602
140	264	336	415	516	646	847	976	1474	2098	2743
150	279	356	439	545	682	891	130	1552	2205	2883
160	293	373	461	572	714	932	1080	1625	2304	3004
170	309	393	485	601	748	976	1135	1703	2412	3145
180	324	412	509	630	783	1020	1189	1782	2519	3285
190	340	432	533	659	818	1064	1244	1860	2626	3425
200	355	451	557	688	853	1108	1299	1939	2733	3566
220	386	490	605	747	922	1196	1408	2096	2948	3846
240	416	529	654	805	992	1285	1517	2253	3162	4127
260	447	568	702	863	1061	1303	1626	2410	3377	4408
280	478	607	750	922	1131	1461	1735	2568	3591	4688
300	509	646	798	980	1200	1549	1844	2725	3806	4969