UNF Unified National Fine
ANSI thread - 60° profile
| Size | TPI | Pitch in | Ext Major in | Int Minor in | Tap Drill Size in | Tap Drill Size mm |
|---|---|---|---|---|---|---|
| #0 | 80 | 0.0125 | 0.0600 | 0.0465 | #56 | 1.2 |
| #1 | 72 | 0.0139 | 0.0730 | 0.0580 | #53 | 1.5 |
| #2 | 64 | 0.0156 | 0.0860 | 0.0691 | #50 | 1.8 |
| #3 | 56 | 0.0179 | 0.0990 | 0.0797 | #45 | 2.1 |
| #4 | 48 | 0.0208 | 0.1120 | 0.0894 | #42 | 2.4 |
| #5 | 44 | 0.0227 | 0.1250 | 0.1004 | #37 | 2.6 |
| #6 | 40 | 0.0250 | 0.1380 | 0.1109 | #33 | 2.9 |
| #8 | 36 | 0.0278 | 0.1640 | 0.1339 | #29 | 3.5 |
| #10 | 32 | 0.0313 | 0.1900 | 0.1562 | #21 | 4.0 |
| #12 | 28 | 0.0357 | 0.2160 | 0.1773 | #14 | 4.6 |
| 1/4" | 28 | 0.0357 | 0.2500 | 0.2113 | #3 | 5.4 |
| 5/16" | 24 | 0.0417 | 0.3125 | 0.2674 | I | 7.0 |
| 3/8" | 24 | 0.0417 | 0.3750 | 0.3299 | Q | 8.5 |
| 7/16" | 20 | 0.0500 | 0.4375 | 0.3834 | 25/64" | 10.0 |
| 1/2" | 20 | 0.0500 | 0.5000 | 0.4459 | 29/64" | 11.5 |
| 9/16" | 18 | 0.0556 | 0.5625 | 0.5024 | 33/64" | 13.0 |
| 5/8" | 18 | 0.0556 | 0.6250 | 0.5649 | 37/64" | 14.5 |
| 3/4" | 16 | 0.0625 | 0.7500 | 0.6823 | 11/16" | 17.5 |
| 7/8" | 14 | 0.0714 | 0.8750 | 0.7977 | 13/16" | 20.5 |
| 1" | 12 | 0.0833 | 1.0000 | 0.9098 | 15/16" | 24.0 |
| 1 1/8" | 12 | 0.0833 | 1.1250 | 1.0348 | 1 11/64" | 26.5 |
| 1 1/4" | 12 | 0.0833 | 1.2500 | 1.1598 | 1 3/64" | 30.0 |
| 1 3/8" | 12 | 0.0833 | 1.3750 | 1.2848 | 1 19/64" | 33.0 |
| 1 1/2" | 12 | 0.0833 | 1.5000 | 1.4098 | 1 27/64" | 36.0 |