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Hex Cap Screw Dimensions Table

Hex Cap Screw Dimensions s
Basic Product Diameter
Body Diameter
Width Across Flats
Width Across Corners
Head Height
Thread Length
Thread Length
Max
Min
Max
Min
Up to 6in
Over 6 in
1/4
0.25
0.245
7/16
0.505
0.488
5/32
0.75
1
5/16
0.3125
0.3065
1/2
0.577
0.557
13/64
0.875
1.125
3/8
0.375
0.369
9/16
0.65
0.628
15/64
1
1.25
7/16
0.4375
0.4305
5/8
0.722
0.698
9/32
1.125
1.375
1/2
0.5
0.493
3/4
0.866
0.84
5/16
1.25
1.5
9/16
0.5625
0.5545
13/16
0.938
0.91
23/64
1.375
1.625
5/8
0.625
0.617
15/16
1.083
1.051
25/64
1.5
1.75
3/4
0.75
0.741
1-1/8
1.299
1.254
15/32
1.75
2
7/8
0.875
0.866
1-5/16
1.516
1.465
35/64
2
2.25
1
1
0.99
1-1/2
1.732
1.675
39/64
2.25
2.5
1-1/8
1.125
1.114
1-11/16
1.949
1.859
11/16
2.5
2.75
1-1/4
1.25
1.239
1-7/8
2.165
2.066
25/32
2.75
3
1-3/8
1.375
1.363
2-1/16
2.382
2.273
27/32
3
3.25
1-1/2
1.5
1.488
2-1/4
2.598
2.48
1-5/16
3.25
3.5
1-3/4
1.75
1.738
2-5/8
3.031
2.893
1-3/32
3.75
4
2
2
1.988
3
3.464
3.306
1-7/32
4.25
4.5
2-1/4
2.25
2.238
3-3/8
3.897
3.719
1-3/8
5
2-1/2
2.5
2.488
3-3/4
4.33
4.133
1-17/32
5.5
2-3/4
2.75
2.738
4-1/8
4.763
4.546
1-11/16
6
3
3
2.988
4-1/2
5.196
4.959
1-7/8
6.5
(standards set by American Society of Mechanical Engineering)

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