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(Non-preferred) dimensions in parentheses.

Hexagon Bolts with Split Pin Hole on Shank

GB /T 31.1 - 2013

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Nominal Length L Tips:seclect Nominal Length L and get .

Screw Thread
d

M10

M12

(M14)

M16

(M18)

M20

(M22)

M24

(M27)

M30

M36

M42

M48

P	Pitch
d₁	max
d₁	min
L₁	Nominal Size

1	1.25	1.5	1.75	2	2	2.5	2.5	2.5	3	3	3.5	4	4.5	5
1.85	2.25	2.75	3.5	3.5	4.3	4.3	4.3	5.3	5.3	5.3	6.66	6.66	8.36	8.36
1.6	2	2.5	3.2	3.2	4	4	4	5	5	5	6.3	6.3	8	8
3.3	4	5	6	6.5	7	8	③	9	10	10	12	13	15	16

Lh (+IT14)

①,The remaining types and sizes are in accordance with the provisions of GB 5782.
③,When the length L of M20 specification is 200mm, the Lh value in the standard of 2013 version is 182mm, and the Lh value in the 1988 version is 192mm.

Alternative history

GB /T 31.1 - 1988 GB /T 31.1 - 2013

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Similar Standards

1	[DIN] 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℃
2	[GB] GB 31.2 - 1988	Hexagon Bolts with Split Pin Hole On Shank-Reduced Shank-Product Grade B
3	[GB] GB /T 31.1 - 1988	Hexagon Bolts with Split Pin Hole on Shank A and B
4	[GB] GB 24 - 1976	Bolts, Small Hexagon Head with Fit Neck and Hole Through The Shank
5	[GB] GB 31.3 - 1988	Hexagon Bolts with Split Pin Hole on Shank-Fine Pitch Thread-Product Grade A and B
6	[BS] BS 1768 - 1963	Unified Hexagon Head Bolts, Washer Faced
7	[GB] GB 23 - 1976	Bolts, Small Hexagon Head with Hole Through The Shank
8	[GOST] GOST 7796 (-2) - 1970	Hexagon Reduced Head Bolts Product Grade B, Type 2
9	[GOST] GOST 7796 (-5) - 1970	Hexagon Reduced Head Bolts Product Grade B, Type 5
10	[GOST] GOST 7798 (2) - 1970	Hexagon Bolts with Split Pin Hole on Shank
11	[GOST] GOST 7805 (-2) - 1970	Hexagon Bolts, Split Pin Hole, Product Grade A, Type 2