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| Nominal Size | Diameter, D | Nut End Minimum Full Thread Length, Bmin | Umax = 2 Thread Pitches | ||||
|---|---|---|---|---|---|---|---|
| L ≤ 10 | 10 < L ≤ 16 | L > 16 | UNC Threads | UNF Threads | 8UN Threads | ||
| 1/4 | 0.2500 | 0.750 | 1.000 | 1.500 | 0.100 | 0.071 | — |
| 5/16 | 0.3125 | 0.875 | 1.125 | 1.625 | 0.111 | 0.083 | — |
| 3/8 | 0.3750 | 1.000 | 1.250 | 1.750 | 0.125 | 0.083 | — |
| 7/16 | 0.4375 | 1.125 | 1.375 | 1.875 | 0.143 | 0.100 | — |
| 1/2 | 0.5000 | 1.250 | 1.500 | 2.000 | 0.154 | 0.100 | — |
| 9/16 | 0.5625 | 1.375 | 1.625 | 2.125 | 0.167 | 0.111 | — |
| 5/8 | 0.6250 | 1.500 | 1.750 | 2.250 | 0.182 | 0.111 | — |
| 3/4 | 0.7500 | 1.750 | 2.000 | 2.500 | 0.200 | 0.125 | — |
| 7/8 | 0.8750 | 2.000 | 2.250 | 2.750 | 0.222 | 0.143 | — |
| 1 | 1.0000 | 2.250 | 2.500 | 3.000 | 0.250 | 0.167 | — |
| 1 1/8 | 1.1250 | 2.500 | 2.750 | 3.250 | 0.286 | 0.167 | 0.250 |
| 1 1/4 | 1.2500 | 2.750 | 3.000 | 3.500 | 0.286 | 0.167 | 0.250 |
| 1 3/8 | 1.3750 | 3.000 | 3.250 | 3.750 | 0.333 | 0.167 | 0.250 |
| 1 1/2 | 1.5000 | 3.250 | 3.500 | 4.000 | 0.333 | 0.167 | 0.250 |
| 1 5/8 | 1.6250 | 3.500 | 3.750 | 4.250 | — | — | 0.250 |
| 1 3/4 | 1.7500 | 3.750 | 4.000 | 4.500 | 0.400 | — | 0.250 |
| 1 7/8 | 1.8750 | 4.000 | 4.250 | 4.750 | — | — | 0.250 |
| 2 | 2.000 | 4.250 | 4.500 | 5.000 | 0.444 | — | 0.250 |
| 2 1/4 | 2.2500 | 4.750 | 5.000 | 5.500 | 0.444 | — | 0.250 |
| 2 1/2 | 2.5000 | 5.250 | 5.500 | 6.000 | 0.500 | — | 0.250 |
| 2 3/4 | 2.7500 | 5.750 | 6.000 | 6.500 | 0.500 | — | 0.250 |
| 3 | 3.000 | — | 6.500 | 7.000 | 0.500 | — | 0.250 |
| 3 1/4 | 3.2500 | — | 7.000 | 7.500 | 0.500 | — | 0.250 |
| 3 1/2 | 3.5000 | — | 7.500 | 8.000 | 0.500 | — | 0.250 |
| 3 3/4 | 3.7500 | — | 8.000 | 8.500 | 0.500 | — | 0.250 |
| 4 | 4.000 | — | 8.500 | 9.000 | 0.500 | — | 0.250 |
All Dimensions are in Inches.
General Notes :