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GB /T 31.2 - 2025

Hexagon Head Bolts with Split Pin Hole on Shank - Reduced Shank - Product Grade B

GB /T 31.2 - 2025 六角头螺杆带孔螺栓细杆B级

See all versions and complete specifications: Hexagon Head Bolts with Split Pin Hole on Shank - Reduced Shank - Product Grade B — Full Specification Page

Dimensional Specifications — GB /T 31.2 - 2025 (mm)

Size	P	s_max	s_min	k_nominal
M6	1	1.6	1.85	3.3
M8	2	3.2	3.5	6.5
M10	2.5	4	4.3	7.7
M12	2.5	4	4.3	7.7
(M7)	1.50	2.5	2.75	4.9

Related Standards

GB /T 31.3 - 2025— Hexagon Head Bolts with Split Pin Hole on Shank - Fine Pitch Thread GB /T 31.1 - 2013— Hexagon Bolts with Split Pin Hole on Shank GB /T 31.1 - 1988— Hexagon Bolts with Split Pin Hole on Shank A and B GB /T 31.2 - 1988— Hexagon Bolts with Split Pin Hole On Shank-Reduced Shank-Product Grade B GB 31.3 - 1988— Hexagon Bolts with Split Pin Hole on Shank-Fine Pitch Thread-Product Grade A and B GB 23 - 1976— Bolts, Small Hexagon Head with Hole Through The Shank GB 24 - 1976— Bolts, Small Hexagon Head with Fit Neck and Hole Through The Shank DIN 65526 - 2016— Aerospace Series - Hexagon Bolts, Close Tolerance, with Short-length MJ Thread, Titanium Alloy, Nominal Tensile Strength 1100 Mpa, for Temperatures up to 315℃

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