Dimensions of Square Head Bolts
|
|||||||||||||||
Thread Length for
Bolt Leng ths, LT (See Para. 3.7) |
|||||||||||||||
Nominal Size
or Basic Product Diameter |
Full-Size Body
Diameter, E (See Paras. 3.4 and 3.5) |
Width Across Flats, F
(See Para. 2.1.2) |
Width Across Corners, G
|
Head Height, H
|
Radius of
Fillet, R |
6 in. and Shorter
|
Over
6 in. |
||||||||
Max.
|
Min.
|
Basic
|
Max.
|
Min.
|
Max.
|
Min.
|
Basic
|
Max.
|
Min.
|
Max.
|
Min.
|
Nom.
|
Nom.
|
||
1/4
|
0.25
|
0.26
|
0.237
|
3/8
|
0.375
|
0.362
|
0.53
|
0.498
|
11/64
|
0.188
|
0.156
|
0.03
|
0.01
|
0.75
|
1
|
5/16
|
0.3125
|
0.324
|
0.298
|
1/2
|
0.5
|
0.484
|
0.707
|
0.665
|
13/64
|
0.22
|
0.186
|
0.03
|
0.01
|
0.875
|
1.125
|
3/8
|
0.375
|
0.388
|
0.36
|
9/16
|
0.562
|
0.544
|
0.795
|
0.747
|
1/4
|
0.268
|
0.232
|
0.03
|
0.01
|
1
|
1.25
|
7/16
|
0.4375
|
0.452
|
0.421
|
5/8
|
0.625
|
0.603
|
0.884
|
0.828
|
19/64
|
0.316
|
0.278
|
0.03
|
0.01
|
1.125
|
1.375
|
1/2
|
0.5
|
0.515
|
0.482
|
3/4
|
0.75
|
0.725
|
1.061
|
0.995
|
21/64
|
0.348
|
0.308
|
0.03
|
0.01
|
1.25
|
1.5
|
5/8
|
0.625
|
0.642
|
0.605
|
1 5/16
|
0.938
|
0.906
|
1.326
|
1.244
|
27/64
|
0.444
|
0.4
|
0.06
|
0.02
|
1.5
|
1.75
|
3/4
|
0.75
|
0.768
|
0.729
|
1 1/8
|
1.125
|
1.088
|
1.591
|
1.494
|
1/2
|
0.524
|
0.476
|
0.06
|
0.02
|
1.75
|
2
|
7/8
|
0.875
|
0.895
|
0.852
|
1 5/16
|
1.312
|
1.269
|
1.856
|
1.742
|
19/32
|
0.62
|
0.568
|
0.06
|
0.02
|
2
|
2.25
|
1
|
1
|
1.022
|
0.976
|
1 1/2
|
1.5
|
1.45
|
2.121
|
1.991
|
21/32
|
0.684
|
0.628
|
0.09
|
0.03
|
2.25
|
2.5
|
1 1/8
|
1.125
|
1.149
|
1.098
|
1 11/16
|
1.688
|
1.631
|
2.386
|
2.239
|
3/4
|
0.78
|
0.72
|
0.09
|
0.03
|
2.5
|
2.75
|
1 1/4
|
1.25
|
1.277
|
1.223
|
1 7/8
|
1.875
|
1.812
|
2.652
|
2.489
|
27/32
|
0.876
|
0.812
|
0.09
|
0.03
|
2.75
|
3
|
1 3/8
|
1.375
|
1.404
|
1.345
|
2 1/16
|
2.062
|
1.994
|
2.917
|
2.738
|
29/32
|
0.94
|
0.872
|
0.09
|
0.03
|
3
|
3.25
|
1 1/2
|
1.5
|
1.531
|
1.47
|
2 1/4
|
2.25
|
2.175
|
3.182
|
2.986
|
1
|
1.036
|
0.964
|
0.09
|
0.03
|
3.25
|
3.5
|
Tags: Square Head Bolts, ASME B18.2.1
General Material:Stainless Steel,Nickel Alloy,Silicon Bronze,Aluminium Bronze,Brass,Naval Brass,Coppe,Copper-Nickel,Aluminum Alloy,Titanium,Alloy Steel,Such as C1008,C1018,C1022,C1035,C1045,40cr,SCM435,35crmoA,42crmoA,AISI4140SS304/A2-70,SS316/A4-80,SS310s,SS309,SS321,SS410,SS317,SS904L,17-4 PH/630,Duplex 2205,Duplex 31803,Nitronic 40,Nitronic 50,Nitronic 60,Nickel Alloy,Hastelloy C276,Inconel 600,Inconel 601,Inconel 625,Inconel 718,Inconel X750,Inconel 800H,Inconel 825,Monel 400,Monel 405,Monel K-500,MP35N,Nickel 200,Nickel 201,Waspaloy)C65500,C64200,C61400,C63000,C63200,C46200,H59,H62,H67,C46400,C11000,90/10 C70600,70/30 C71500,6061-T6,2024-T4,Ti-6Al-4V Grade 5,ASTM B348 Grade 2,ASTM B348 Grade 7,651/S63198
General Surface Finish:Blackoxide,Zinc,Dacromet 500/Dacromet 320,Non-electrolytically Deposited Zinc Flake,Hot-dip Galvanization,Phosphating,Passviation
General Surface Finish:Blackoxide,Zinc,Dacromet 500/Dacromet 320,Non-electrolytically Deposited Zinc Flake,Hot-dip Galvanization,Phosphating,Passviation