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BS 4395

Metric High Strength Large Hexagon Head Bolts

BS 4395-1 - 1969 米制高强度大六角头螺栓 Table 5

See all versions and complete specifications: Metric High Strength Large Hexagon Head Bolts — Full Specification Page

Dimensional Specifications — BS 4395 (mm)

Size	P	k_max	k_min	s_max	s_min	ds_max	ds_min	k_nominal	ds_nominal
M16	2.5	35	41.6	22.84	21.16	14.9	13.1	36	39.55
M20	3	45	53.1	27.84	26.16	17.9	16.1	46	50.85
M22	4	58.8	69.3	37	35	24.05	21.95	60	66.44
(M12)	2	26.16	31.2	16.7	15.3	10.45	9.55	27	29.30

Related Standards

GB /T 1231 (bolt) - 2024— High Strength Bolts with Large Hexagon Head Assemblies for Steel Structures GB /T 9125.1 - 2020— Hex Bolt for Pipe Flange Connection - PN Designated GB /T 9125.2 - 2020— Hex Bolt for Pipe Flange Connection - Class Designated GB /T 16939 - 2016— High Strength Bolts for Joints of Space Grid Structures GB /T 9125 - 2010— Hex Bolt for Pipe Flange Connection GB /T 1228 - 2006— High Strength Bolts with Large Hexagon Head for Steel Structures GB /T 9125 - 2003— Hex Bolt for Pipe Flange Connection GB /T 16939 - 1997— High Strength Bolts for Joints of Space Grid Structures

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