| Size | Basic Major Diameter | Basic Pitch Diameter | Minor Diameter | Minor Dia. Area | Tensile Stress Area | ||
| Size Primary | Size Secondary | External Thread | Internal Thread | ||||
| inch | inch | inch | inch | inch | inch | sq. inch | sq. inch |
| 13/8* | 1.3750 | 1.2667 | 1.1766 | 1.1946 | 1.054 | 1.155 | |
| 17/16 | 1.4375 | 1.3292 | 1.2391 | 1.2571 | 1.171 | 1.277 | |
| 11/2* | 1.5000 | 1.3917 | 1.3016 | 1.3196 | 1.294 | 1.405 | |
| 19/16 | 1.5625 | 1.4542 | 1.3641 | 1.3821 | 1.423 | 1.54 | |
| 15/8 | 1.6250 | 1.5167 | 1.4271 | 1.4446 | 1.56 | 1.68 | |
| 111/16 | 1.6875 | 1.5792 | 1.4891 | 1.5071 | 1.70 | 1.83 | |
| 13/4 | 1.7500 | 1.6417 | 1.5516 | 1.5696 | 1.85 | 1.98 | |
| 113/16 | 1.8125 | 1.7042 | 1.6141 | 1.6321 | 2.00 | 2.14 | |
| 17/8 | 1.8750 | 1.7667 | 1.6766 | 1.6946 | 2.16 | 2.30 | |
| 115/16 | 1.9375 | 1.8292 | 1.7391 | 1.7571 | 2.33 | 2.47 | |
| 2 | 2.0000 | 1.8917 | 1.8016 | 1.8196 | 2.50 | 2.65 | |
| 21/8 | 2.1250 | 2.0167 | 1.9266 | 1.9446 | 2.86 | 3.03 | |
| 21/4 | 2.2500 | 2.1417 | 2.0516 | 2.0696 | 3.25 | 3.42 | |
| 23/8 | 2.3750 | 2.2667 | 2.1766 | 2.1946 | 3.66 | 3.85 | |
| 21/2 | 2.5000 | 2.3917 | 2.3016 | 2.3196 | 4.10 | 4.29 | |
| 25/8 | 2.6250 | 2.5167 | 2.4266 | 2.4446 | 4.56 | 4.76 | |
| 23/4 | 2.7500 | 2.6417 | 2.5516 | 2.5696 | 5.04 | 5.26 | |
| 27/8 | 2.8750 | 2.7667 | 2.6766 | 2.6946 | 5.55 | 5.78 | |
| 3 | 3.0000 | 2.8917 | 2.8016 | 2.8196 | 6.09 | 6.33 | |
| 31/8 | 3.1250 | 3.0167 | 2.9266 | 2.9446 | 6.64 | 6.89 | |
| 31/4 | 3.2500 | 3.1417 | 3.0516 | 3.0696 | 7.23 | 7.49 | |
| 33/8 | 3.3750 | 3.2667 | 3.1766 | 3.1946 | 7.84 | 8.11 | |
| 31/2 | 3.5000 | 3.3917 | 3.3016 | 3.3196 | 8.47 | 8.75 | |
| 35/8 | 3.6250 | 3.5167 | 3.4266 | 3.4446 | 9.12 | 9.42 | |
| 33/4 | 3.7500 | 3.6417 | 3.5516 | 3.5696 | 9.81 | 10.11 | |
| 37/8 | 3.8750 | 3.7667 | 3.6766 | 3.6946 | 10.51 | 10.83 | |
| 4 | 4.0000 | 3.8917 | 3.8016 | 3.8196 | 11.24 | 11.57 | |
| 41/8 | 4.1250 | 4.0167 | 3.9266 | 3.9446 | 12.00 | 12.33 | |
| 41/4 | 4.2500 | 4.1417 | 4.0516 | 4.0696 | 12.78 | 13.12 | |
| 43/8 | 4.3750 | 4.2667 | 4.1766 | 4.1946 | 13.58 | 13.94 | |
| 41/2 | 4.5000 | 4.3917 | 4.3016 | 4.3196 | 14.41 | 14.78 | |
| 45/8 | 4.6250 | 4.5167 | 4.4266 | 4.4446 | 15.3 | 15.6 | |
| 43/4 | 4.7500 | 4.6417 | 4.5516 | 4.5696 | 16.1 | 16.5 | |
| 47/8 | 4.8750 | 4.7667 | 4.6766 | 4.6946 | 17.0 | 17.5 | |
| 5 | 5.0000 | 4.8917 | 4.8016 | 4.8196 | 18.0 | 18.4 | |
| 51/8 | 5.1250 | 5.0167 | 4.9266 | 4.9446 | 18.9 | 19.3 | |
| 51/4 | 5.2500 | 5.1417 | 5.0516 | 5.0696 | 19.9 | 20.3 | |
| 53/8 | 5.3750 | 5.2667 | 5.1766 | 5.1946 | 20.9 | 21.3 | |
| 51/2 | 5.5000 | 5.3917 | 5.3016 | 5.3196 | 21.9 | 22.4 | |
| 55/8 | 5.6250 | 5.5167 | 5.4266 | 5.4446 | 23.0 | 23.4 | |
| 53/4 | 5.7500 | 5.6417 | 5.5516 | 5.5696 | 24.0 | 24.5 | |
| 57/8 | 5.8750 | 5.7667 | 5.6766 | 5.6946 | 25.1 | 25.6 | |
| 6 | 6.0000 | 5.8917 | 5.8016 | 5.8196 | 26.3 | 26.8 | |
| inch | inch | inch | inch | inch | inch | sq. inch | sq. inch |
| Size Primary | Size Secondary | Basic Major Diameter | Basic Pitch Diameter | External Thread | Internal Thread | Minor Dia. Area | Tensile Stress Area |
| Size | Minor Diameter | ||||||
| * Standard Sizes of the UNC series |
