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Twist-Off-Type Tension Control Structural Bolts: Heavy Hex Head Configurations (ASTM F3125 / F3125M)

ASME B 18.2.6 - 2019

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Thread Size

1/2

5/8

3/4

7/8

1-1/8

1-1/4

PP	UNC
s	max
	min
e	max
	min
k	max
	min
d_s	max
	min
b	Thread Length	Ref.
z	Ref.
s₁	Ref.

13	11	10	9	8	7	7
0.875	1.062	1.25	1.438	1.625	1.812	2
0.85	1.031	1.212	1.394	1.575	1.756	1.938
1.01	1.227	1.443	1.66	1.876	2.093	2.309
0.969	1.175	1.383	1.589	1.796	2.002	2.209
0.323	0.403	0.483	0.563	0.627	0.718	0.813
0.302	0.378	0.455	0.531	0.591	0.658	0.749
0.515	0.642	0.768	0.895	1.022	1.149	1.277
0.482	0.605	0.729	0.852	0.976	1.098	1.223
1	1.25	1.38	1.5	1.75	2	2
0.5	0.6	0.65	0.72	0.8	0.9	1
0.32	0.43	0.53	0.61	0.7	0.8	0.9

①,Chemical and mechanical properties shall conform to ASTM F 1852 or ASTM F 2280, as applicable.
②,ASTM A325 / A325M / A490 / A490M / F1852 / F2280 have been replaced by ASTM F3125

Alternative history

ASME B 18.2.6 - 2006 ASME B 18.2.6 - 2010 ASME B 18.2.6 - 2019

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Similar Standards

1	[EN] EN 14399-10 (Hexagon Bolt) - 2018	High-Strength Structural Bolting Assemblies for Preloading - System HRC - Bolt HRC with Hexagon Head
2	[ASME] ASME B 18.2.6 - 2006	Steel Structure with High Torsional Shear Strength Hexagon Head Bolts (ASTM F 1852 / ASTM F 2280)
3	[ASME] ASME B 18.2.6 - 2010	Twist-off-type Tension Control Structural Bolts: Heavy Hex Head Configurations (ASTM F 1852 / ASTM F 2280)
4	[GB] GB /T 32076.9 - 2017	Torshear Type Bolt with Hexagon Head with Large Width Across Flats