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ANSI Inch Size Thread Stress and Shear Areas Table

ANSI Hardware Engineering Data

Selected ANSI UNC/UNF/8UN Thread Stress and Shear Areas

Note: All areas are given in square inches.

Thread
Tensile
Stress
Area
Bolt Thread
Strip
Area,
Le + 1 Diameter

Nut Thread Strip Area,

Le = Diameter
2A/2B
3A/3B
2A/2B
3A/3B
0.1900–24 UNC
0.0175
0.050
0.053
0.076
0.080
0.1900–32 UNF
0.0200
0.052
0.055
0.074
0.078
0.2500–20 UNC
0.0318
0.092
0.096
0.135
0.141
0.2500–28 UNF
0.0364
0.093
0.101
0.130
0.137
0.3125–18 UNC
0.0524
0.147
0.157
0.213
0.222
0.3750–16 UCN
0.0775
0.216
0.232
0.310
0.322
0.3750–24 UNF
0.0878
0.217
0.242
0.299
0.314
0.4375–14 UFC
0.0163
0.296
0.321
0.428
0.443
0.5000–13 UFC
0.1419
0.389
0.427
0.562
0.581
0.5000–20 UNF
0.1599
0.400
0.444
0.541
0.567
0.5625–12 UNC
0.182
0.503
0.548
0.717
0.741
0.6250–11 UNC
0.226
0.624
0.683
0.891
0.919
0.6250–18 UNF
0.256
0.624
0.708
0.853
0.892
0.7500–10 UNC
0.334
0.910
1.00
1.29
1.33
0.7500–16 UNF
0.373
0.924
1.04
1.24
1.30
0.8750–9 UNC
0.462
1.24
1.38
1.77
1.83
0.8750–14 UNF
0.509
1.26
1.43
1.71
1.78
1.0000–8 UNC
0.606
1.66
1.82
2.33
2.40
1.1250–8 UN
0.790
1.92
2.14
2.95
3.04
1.2500–8 UN
1.000
2.65
2.91
3.65
3.75
1.3750–8 UN
1.233
3.22
3.55
4.41
4.54
1.5000–8 UN
1.492
3.86
4.26
5.25
5.41
1.6250–8 UN
1.78
4.55
5.03
6.17
6.35
1.7500–8 UN
2.08
5.30
5.87
7.15
7.36
1.8750–8 UN
2.41
6.10
6.76
8.20
8.45
2.0000–8 UN
2.77
6.96
7.72
9.32
9.61
2.2500–8 UN
3.56
8.85
9.83
11.78
12.16
2.5000–8 UN
4.44
10.96
12.19
14.53
15.01
2.7500–8 UN
5.43
13.30
14.80
17.57
18.16
3.0000–8 UN
6.51
15.85
17.67
20.88
21.59
3.2500–8 UN
7.69
18.62
20.79
24.47
25.32
3.5000–8 UN
8.96
21.63
24.16
28.37
29.36
3.7500–8 UN
10.34
24.83
27.78
32.51
33.67
4.0000–8 UN
11.81
28.28
31.65
36.96
38.30

Where:

Le = length of thread engagement

Related

Reference:

ASME / ANSI B1.1

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