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| Measured in Inches | ||||||
|---|---|---|---|---|---|---|
| Size Primary Inch | Basic Major Diameter Inch | Basic Pitch Diameter Inch | Minor Diameter, inch | Minor Dia. Area sq. inch | Tensile Stress Area sq. inch | |
| External Thread | Internal Thread | |||||
| 1 – 3/8 | 1.375 | 1.2667 | 1.1766 | 1.1946 | 1.054 | 1.155 |
| 1 – 7/16 | 1.4375 | 1.3292 | 1.2391 | 1.2571 | 1.171 | 1.277 |
| 1 – 1/2 | 1.5 | 1.3917 | 1.3016 | 1.3196 | 1.294 | 1.405 |
| 1 – 9/16 | 1.5625 | 1.4542 | 1.3641 | 1.3821 | 1.423 | 1.54 |
| 1 – 5/8 | 1.625 | 1.5167 | 1.4271 | 1.4446 | 1.56 | 1.68 |
| 1 – 11/16 | 1.6875 | 1.5792 | 1.4891 | 1.5071 | 1.7 | 1.83 |
| 1 – 3/4 | 1.75 | 1.6417 | 1.5516 | 1.5696 | 1.85 | 1.98 |
| 1 – 13/16 | 1.8125 | 1.7042 | 1.6141 | 1.6321 | 2 | 2.14 |
| 1 – 7/8 | 1.875 | 1.7667 | 1.6766 | 1.6946 | 2.16 | 2.3 |
| 1 – 15/16 | 1.9375 | 1.8292 | 1.7391 | 1.7571 | 2.33 | 2.47 |
| 2 | 2 | 1.8917 | 1.8016 | 1.8196 | 2.5 | 2.65 |
| 2 – 1/8 | 2.125 | 2.0167 | 1.9266 | 1.9446 | 2.86 | 3.03 |
| 2 – 1/4 | 2.25 | 2.1417 | 2.0516 | 2.0696 | 3.25 | 3.42 |
| 2 – 3/8 | 2.375 | 2.2667 | 2.1766 | 2.1946 | 3.66 | 3.85 |
| 2 – 1/2 | 2.5 | 2.3917 | 2.3016 | 2.3196 | 4.1 | 4.29 |
| 2 – 5/8 | 2.625 | 2.5167 | 2.4266 | 2.4446 | 4.56 | 4.76 |
| 2 – 3/4 | 2.75 | 2.6417 | 2.5516 | 2.5696 | 5.04 | 5.26 |
| 2 – 7/8 | 2.875 | 2.7667 | 2.6766 | 2.6946 | 5.55 | 5.78 |
| 3 | 3 | 2.8917 | 2.8016 | 2.8196 | 6.09 | 6.33 |
| 3 – 1/8 | 3.125 | 3.0167 | 2.9266 | 2.9446 | 6.64 | 6.89 |
| 3 – 1/4 | 3.25 | 3.1417 | 3.0516 | 3.0696 | 7.23 | 7.49 |
| 3 – 3/8 | 3.375 | 3.2667 | 3.1766 | 3.1946 | 7.84 | 8.11 |
| 3 – 1/2 | 3.5 | 3.3917 | 3.3016 | 3.3196 | 8.47 | 8.75 |
| 3 – 5/8 | 3.625 | 3.5167 | 3.4266 | 3.4446 | 9.12 | 9.42 |
| 3 – 3/4 | 3.75 | 3.6417 | 3.5516 | 3.5696 | 9.81 | 10.11 |
| 3 – 7/8 | 3.875 | 3.7667 | 3.6766 | 3.6946 | 10.51 | 10.83 |
| 4 | 4 | 3.8917 | 3.8016 | 3.8196 | 11.24 | 11.57 |
| 4 – 1/8 | 4.125 | 4.0167 | 3.9266 | 3.9446 | 12 | 12.33 |
| 4 – 1/4 | 4.25 | 4.1417 | 4.0516 | 4.0696 | 12.78 | 13.12 |
| 4 – 3/8 | 4.375 | 4.2667 | 4.1766 | 4.1946 | 13.58 | 13.94 |
| 4 – 1/2 | 4.5 | 4.3917 | 4.3016 | 4.3196 | 14.41 | 14.78 |
| 4 – 5/8 | 4.625 | 4.5167 | 4.4266 | 4.4446 | 15.3 | 15.6 |
| 4 – 3/4 | 4.75 | 4.6417 | 4.5516 | 4.5696 | 16.1 | 16.5 |
| 4 – 7/8 | 4.875 | 4.7667 | 4.6766 | 4.6946 | 17 | 17.5 |
| 5 | 5 | 4.8917 | 4.8016 | 4.8196 | 18 | 18.4 |
| 5 – 1/8 | 5.125 | 5.0167 | 4.9266 | 4.9446 | 18.9 | 19.3 |
| 5 – 1/4 | 5.25 | 5.1417 | 5.0516 | 5.0696 | 19.9 | 20.3 |
| 5 – 3/8 | 5.375 | 5.2667 | 5.1766 | 5.1946 | 20.9 | 21.3 |
| 5 – 1/2 | 5.5 | 5.3917 | 5.3016 | 5.3196 | 21.9 | 22.4 |
| 5 – 5/8 | 5.625 | 5.5167 | 5.4266 | 5.4446 | 23 | 23.4 |
| 5 – 3/4 | 5.75 | 5.6417 | 5.5516 | 5.5696 | 24 | 24.5 |
| 5 – 7/8 | 5.875 | 5.7667 | 5.6766 | 5.6946 | 25.1 | 25.6 |
| 6 | 6 | 5.8917 | 5.8016 | 5.8196 | 26.3 | 26.8 |