Threaded Insert Number Of Coils In The Free State (UNC)
Nominal Diameter |
Pitch (mm) |
Drill Bit Diameter (mm) |
Drilling Diameter | Tap | Number Of Coils In The Free State | |||||
---|---|---|---|---|---|---|---|---|---|---|
min. | max. | Min Outer Diameter |
1d | 1.5d | 2d | 2.5d | 3d | |||
2-56 | 0.453 | 2.4 | 2.30 | 2.50 | 2.77 | 3.0 | 5.2 | 7.4 | 9.6 | 11.8 |
3-48 | 0.529 | 2.7 | 2.65 | 2.80 | 3.20 | 2.8 | 5.0 | 7.2 | 9.4 | 11.5 |
4-40 | 0.635 | 3.1 | 3.00 | 3.15 | 3.67 | 2.8 | 4.8 | 6.8 | 8.8 | 10.8 |
5-40 | 0.635 | 3.4 | 3.33 | 3.50 | 4.00 | 3.3 | 5.5 | 7.8 | 10.0 | 12.2 |
6-32 | 0.794 | 3.8 | 3.68 | 3.89 | 4.54 | 2.8 | 4.8 | 6.7 | 8.7 | 10.8 |
8-32 | 0.794 | 4.4 | 4.34 | 4.52 | 5.20 | 3.5 | 5.9 | 8.3 | 10.7 | 13.2 |
10-24 | 1.058 | 5.2 | 5.06 | 5.28 | 6.20 | 2.9 | 5.0 | 7.1 | 9.2 | 11.4 |
12-24 | 1.058 | 5.8 | 5.72 | 5.92 | 6.86 | 3.5 | 5.9 | 8.3 | 10.7 | 13.2 |
1/4-20 | 1.270 | 6.7 | 6.62 | 6.86 | 8.00 | 3.4 | 5.7 | 8.0 | 10.3 | 12.7 |
5/16-18 | 1.411 | 8.4 | 8.24 | 8.49 | 9.77 | 4.0 | 6.6 | 9.3 | 11.9 | 14.7 |
3/8-16 | 1.588 | 10.0 | 9.89 | 10.12 | 11.59 | 4.4 | 7.2 | 10.0 | 12.9 | 15.7 |
7/16-14 | 1.814 | 11.6 | 11.51 | 11.78 | 13.47 | 4.5 | 7.4 | 10.3 | 13.1 | 16.1 |
1/2-13 | 1.954 | 13.2 | 13.12 | 13.40 | 15.24 | 4.8 | 7.9 | 10.9 | 13.9 | 17.1 |
9/16-12 | 2.117 | 14.9 | 14.75 | 15.03 | 17.04 | 5.1 | 8.3 | 11.5 | 14.7 | 17.8 |
5/8-11 | 2.309 | 16.5 | 16.38 | 16.68 | 18.88 | 5.3 | 8.3 | 11.8 | 15.0 | 18.4 |
3/4-10 | 2.540 | 19.8 | 19.60 | 19.91 | 22.35 | 5.9 | 9.4 | 13.0 | 16.5 | 20.2 |
7/8-9 | 2.822 | 23.0 | 22.84 | 23.18 | 25.89 | 6.3 | 10.0 | 13.7 | 17.5 | 21.3 |
1″-8 | 3.175 | 26.4 | 26.09 | 26.47 | 29.53 | 6.4 | 10.2 | 14.0 | 17.7 | 21.6 |
1″ 1/8-7 | 3.629 | 29.5 | 29.36 | 29.74 | 33.29 | 6.3 | 9.9 | 13.6 | 17.5 | 21.3 |
1″ 1/4-7 | 3.629 | 32.8 | 32.54 | 32.92 | 36.46 | 7.0 | 11.2 | 15.4 | 19.5 | 23.7 |
1″ 3/8-6 | 4.234 | 36.2 | 35.84 | 36.35 | 40.42 | 6.5 | 10.5 | 14.4 | 18.4 | 22.3 |
1″ 1/2-6 | 4.234 | 39.5 | 39.02 | 39.53 | 43.62 | 7.2 | 11.5 | 15.9 | 20.2 | 24.5 |
All information is strictly informative