DRILL DIAMETERS FOR THREAD RECOMMENDATION TABLES
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CYLINDRICAL AMERICAN PIPE THREAD -DRYSEAL-
Tap NPSF |
Min Internal Diameter mm |
Recommanded Drill Diameter mm |
Ex1 |
1/8"-27 |
8.651 |
8.7 |
0 |
1/4"-18 |
11.232 |
11.3 |
0 |
3/8"-18 |
14.671 |
14.75 |
0 |
1/2"-14 |
18.118 |
18.25 |
0 |
3/4"-14 |
23.465 |
23.5 |
0 |
1"-11.1/2 |
29.464 |
29.5 |
0 | |