|
Dimensions of Hex Cap Screws
|
||||||||||||||||
|
Thread Length for
Screw Leng ths, LT (See Para. 4.7) |
Transition Thread
Leng th, Y See Para. 4.7) |
Maximum
Total Runout of Bearing Surface FIM (See Para. 4.4) |
||||||||||||||
|
Nominal Size
or Basic Product Diameter |
Body
Diameter, E (See Para. 4.6) |
Width Across Flats, F (See Para. 2.1.2)
|
Width Across Corners, G
|
Head Height, H
|
Minimum Wrenching Height,
|
6 in. and Shorter
|
Over 6 in.
|
Reference
|
||||||||
|
Max.
|
Min.
|
Basic
|
Max.
|
Min.
|
Max.
|
Min.
|
Basic
|
Max.
|
Min.
|
|||||||
|
1/4
|
0.25
|
0.25
|
0.245
|
7/16
|
0.438
|
0.428
|
0.505
|
0.488
|
5/32
|
0.163
|
0.15
|
0.106
|
0.75
|
1
|
0.25
|
0.01
|
|
5/16
|
0.313
|
0.3125
|
0.3065
|
1/2
|
0.5
|
0.489
|
0.577
|
0.557
|
13/64
|
0.211
|
0.195
|
0.14
|
0.875
|
1.125
|
0.278
|
0.011
|
|
3/8
|
0.375
|
0.375
|
0.369
|
9/16
|
0.562
|
0.551
|
0.65
|
0.628
|
15/64
|
0.243
|
0.226
|
0.16
|
1
|
1.25
|
0.312
|
0.012
|
|
7/16
|
0.438
|
0.4375
|
0.4305
|
5/8
|
0.625
|
0.612
|
0.722
|
0.698
|
9/32
|
0.291
|
0.272
|
0.195
|
1.125
|
1.375
|
0.357
|
0.013
|
|
1/2
|
0.5
|
0.5
|
0.493
|
3/4
|
0.75
|
0.736
|
0.866
|
0.84
|
5/16
|
0.323
|
0.302
|
0.215
|
1.25
|
1.5
|
0.385
|
0.014
|
|
9/16
|
0.563
|
0.5625
|
0.5545
|
13/16
|
0.812
|
0.798
|
0.938
|
0.91
|
23/64
|
0.371
|
0.348
|
0.25
|
1.375
|
1.625
|
0.417
|
0.015
|
|
5/8
|
0.625
|
0.625
|
0.617
|
15/16
|
0.938
|
0.922
|
1.083
|
1.051
|
25/64
|
0.403
|
0.378
|
0.269
|
1.5
|
1.75
|
0.455
|
0.017
|
|
3/4
|
0.75
|
0.75
|
0.741
|
1 1/8
|
1.125
|
1.1
|
1.299
|
1.254
|
15/32
|
0.483
|
0.455
|
0.324
|
1.75
|
2
|
0.5
|
0.02
|
|
7/8
|
0.875
|
0.875
|
0.866
|
1 5/16
|
1.312
|
1.285
|
1.516
|
1.465
|
35/64
|
0.563
|
0.531
|
0.378
|
2
|
2.25
|
0.556
|
0.023
|
|
1
|
1
|
1
|
0.99
|
1 1/2
|
1.5
|
1.469
|
1.732
|
1.675
|
39/64
|
0.627
|
0.591
|
0.416
|
2.25
|
2.5
|
0.625
|
0.026
|
|
1 1/8
|
1.125
|
1.125
|
1.114
|
1 11/16
|
1.688
|
1.631
|
1.949
|
1.859
|
11/16
|
0.718
|
0.658
|
0.461
|
2.5
|
2.75
|
0.714
|
0.029
|
|
1 1/4
|
1.25
|
1.25
|
1.239
|
1 7/8
|
1.875
|
1.812
|
2.165
|
2.066
|
25/32
|
0.813
|
0.749
|
0.53
|
2.75
|
3
|
0.714
|
0.033
|
|
1 3/8
|
1.375
|
1.375
|
1.363
|
2 1/16
|
2.062
|
1.994
|
2.382
|
2.273
|
27/32
|
0.878
|
0.81
|
0.569
|
3
|
3.25
|
0.833
|
0.036
|
|
1 1/2
|
1.5
|
1.5
|
1.488
|
2 1/4
|
2.25
|
2.175
|
2.598
|
2.48
|
15/16
|
0.974
|
0.902
|
0.64
|
3.25
|
3.5
|
0.833
|
0.039
|
|
1 5/8
|
1.625
|
1.625
|
1.613
|
2 7/16
|
2.438
|
2.356
|
2.815
|
2.686
|
1
|
1.038
|
0.962
|
0.694
|
3.5
|
3.75
|
0.909
|
0.043
|
|
1 3/4
|
1.75
|
1.75
|
1.738
|
2 5/8
|
2.625
|
2.538
|
3.031
|
2.893
|
1 3/32
|
1.134
|
1.054
|
0.748
|
3.75
|
4
|
1
|
0.046
|
|
1 7/8
|
1.875
|
1.875
|
1.863
|
2 13/16
|
2.812
|
2.719
|
3.248
|
3.099
|
1 5/32
|
1.198
|
1.114
|
0.802
|
4
|
4.25
|
1
|
0.049
|
|
2
|
2
|
2
|
1.988
|
3
|
3
|
2.9
|
3.464
|
3.306
|
1 7/32
|
1.263
|
1.175
|
0.825
|
4.25
|
4.5
|
1.111
|
0.052
|
|
2 1/4
|
2.25
|
2.25
|
2.238
|
3 3/8
|
3.375
|
3.262
|
3.897
|
3.719
|
1 3/8
|
1.423
|
1.327
|
0.933
|
…
|
5
|
1.111
|
0.059
|
|
2 1/2
|
2.5
|
2.5
|
2.488
|
3 3/4
|
3.75
|
3.625
|
4.33
|
4.133
|
1 17/32
|
1.583
|
1.479
|
1.042
|
…
|
5.5
|
1.25
|
0.065
|
|
2 3/4
|
2.75
|
2.75
|
2.738
|
4 1/8
|
4.125
|
3.988
|
4.763
|
4.546
|
1 11/16
|
1.744
|
1.632
|
1.151
|
…
|
6
|
1.25
|
0.072
|
|
3
|
3
|
3
|
2.988
|
4 1/2
|
4.5
|
4.35
|
5.196
|
4.959
|
1 7/8
|
1.935
|
1.815
|
1.29
|
…
|
6.5
|
1.25
|
0.079
|