|
Pipe |
|
Tapping Drills |
||||||||||||
|
Size |
Threads/ |
Nom. OD (in) |
Taper NPT w/ Reamer |
|
Taper NPT w/o Reamer |
|
Straight NPS |
|||||||
|
Drill Size |
Equivalents |
Drill Size |
Equivalents |
Drill Size |
Equivalents |
|||||||||
|
(in) |
(mm) |
(in) |
(mm) |
(in) |
(mm) |
|||||||||
|
|
|
|
|
|||||||||||
|
3/8 |
18 |
0.675 |
|
9/16" |
0.5625 |
14.2875 |
|
37/64" |
0.5781 |
14.6844 |
|
19/32" |
0.5938 |
15.0813 |
|
1/2 |
14 |
0.840 |
11/16" |
0.6875 |
17.4625 |
45/64" |
0.7031 |
17.8594 |
23/32" |
0.7188 |
18.2563 |
|||
-
Ream the hole before tapping with a reamer having a taper of 3/4 inch per foot.