Threaded Insert Fitted (UNF)
| Nominal Diameter |
Pitch (mm) |
Drill Bit Diameter (mm) |
Drilling Diameter | Tap | Insert Fitted | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| min. | max. | Min Outer Diameter |
1d | 1.5d | 2d | 2.5d | 3d | |||
| 2-64 | 0.396 | 2.3 | 2.29 | 2.44 | 2.70 | 1.8 | 2.9 | 4.0 | 5.0 | 6.2 |
| 3-56 | 0.453 | 2.7 | 2.62 | 2.77 | 3.10 | 2.0 | 3.3 | 4.6 | 5.8 | 7.1 |
| 4-48 | 0.529 | 3.0 | 2.97 | 3.14 | 3.53 | 2.3 | 3.7 | 5.2 | 6.6 | 8.0 |
| 6-40 | 0.635 | 3.8 | 3.66 | 3.81 | 4.33 | 2.9 | 4.6 | 6.4 | 8.1 | 9.9 |
| 8-36 | 0.706 | 4.4 | 4.32 | 4.47 | 5.08 | 3.4 | 5.5 | 7.6 | 9.7 | 11.8 |
| 10-32 | 0.794 | 5.1 | 5.00 | 5.16 | 5.86 | 4.0 | 6.5 | 8.9 | 11.3 | 13.7 |
| 1/4-28 | 0.907 | 6.7 | 6.55 | 6.72 | 7.53 | 5.5 | 8.6 | 11.8 | 15.0 | 18.1 |
| 5/16-24 | 1.058 | 8.3 | 8.17 | 8.35 | 9.31 | 6.9 | 10.9 | 14.9 | 18.8 | 22.7 |
| 3/8-24 | 1.058 | 9.9 | 9.75 | 9.93 | 10.90 | 8.4 | 13.2 | 18.0 | 22.8 | 27.5 |
| 7/16-20 | 1.270 | 11.5 | 11.39 | 11.59 | 12.76 | 9.8 | 15.4 | 20.9 | 26.5 | 32.0 |
| 1/2-20 | 1.270 | 13.1 | 12.97 | 13.16 | 14.35 | 11.4 | 17.8 | 24.1 | 30.5 | 36.8 |
| 9/16-18 | 1.411 | 14.7 | 14.59 | 14.79 | 16.12 | 12.9 | 20.1 | 27.2 | 34.4 | 41.4 |
| 5/8-18 | 1.411 | 16.3 | 16.18 | 16.38 | 17.71 | 14.5 | 22.4 | 30.4 | 38.3 | 46.2 |
| 3/4-16 | 1.588 | 19.5 | 19.39 | 19.60 | 21.11 | 17.5 | 27.0 | 36.5 | 46.0 | 55.6 |
| 7/8-14 | 1.814 | 22.7 | 22.62 | 22.84 | 24.58 | 20.4 | 31.5 | 42.7 | 53.8 | 64.8 |
| 1″-14 | 1.814 | 26.0 | 25.86 | 26.11 | 27.76 | 23.6 | 36.3 | 49.0 | 61.7 | 74.4 |
| 1″-12 | 2.117 | 26.0 | 25.86 | 26.11 | 28.15 | 23.3 | 36.0 | 48.7 | 61.4 | 74.0 |
| 1″ 1/8-12 | 2.117 | 29.2 | 29.03 | 29.29 | 31.33 | 26.5 | 40.7 | 55.0 | 69.3 | 83.6 |
| 1″ 1/4-12 | 2.117 | 32.4 | 32.21 | 32.21 | 34.50 | 29.7 | 45.5 | 61.4 | 77.2 | 93.1 |
| 1″ 3/8-12 | 2.117 | 35.5 | 35.38 | 35.38 | 37.68 | 32.8 | 50.3 | 67.8 | 85.2 | 102.6 |
| 1″ 1/2-12 | 2.117 | 38.7 | 38.56 | 38.56 | 40.85 | 36.0 | 55.1 | 74.1 | 93.1 | 112.2 |
All information is strictly informative