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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
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Reference:
ASME / ANSI B1.1