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GB 8 - 1976

Square Head Bolts - Product Grade C (Black)

GB 8 - 1976 方头螺栓 C级（粗制）

See all versions and complete specifications: Square Head Bolts - Product Grade C (Black) — Full Specification Page

Dimensional Specifications — GB 8 - 1976 (mm)

Size	P	k_max	k_min	s_max	s_min	ds_max	k_nominal	ds_nominal
M10	1.75	8.58	7.42	19	18.48	0.8	8	26.9
M12	2.0	10.58	9.42	24	23.48	1	10	33.9
M16	3	15.70	14.30	36	35	1.5	15	51
M20	4.5	27.30	24.70	65	63.8	2	26	92
(M14)	2.5	13.70	12.30	30

Related Standards

GB /T 8 - 2021— Square Head Bolts - Product Grade C GB 8 - 1988— Square Head Bolts - Product Grade C GB /T 35 - 2013— Square Head Bolts with Small Head GB /T 35 - 1988— Small Square Head Bolts DIN 21346 - 1989— Square Head Bolts for Shaft Guides JIS E 1107 - 2008— Fish Plate Bolt Square Head JIS B 1182 (T1-1) - 1995— Thin Square Head Bolts [Table 1-1]JIS B 1182 (T1-2) - 1995— Square Head Bolts [Table 1-2]

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