Tap and Drill sizes - Inch
Inch Sizes - Coarse |
Inch Sizes - Fine |
|||
Tap Size |
Drill Size |
bbb | Tap Size |
Drill Size |
0-80 |
3/64 |
1-72 |
#53 |
|
1-64 |
#53 |
2-64 |
#50 |
|
2-56 |
#51 |
3-56 |
#46 |
|
3-48 |
5-64 |
4-48 |
#42 |
|
4-40 |
#43 |
5-44 |
#37 |
|
5-40 |
#39 |
6-40 |
#33 |
|
6-32 |
#36 |
8-36 |
#29 |
|
8-32 |
#29 |
10-32 |
#21 |
|
10-24 |
#25 |
12-28 |
#15 |
|
12-24 |
#17 |
1/4-28 |
#3 |
|
1/4-20 |
#7 |
5/16-24 |
I |
|
5/16-18 |
F |
3/8-24 |
Q |
|
3/8-16 |
5/16 |
7/16-20 |
W |
|
7/16-14 |
U |
1/2-20 |
29/64 |
|
1/2-13 |
27/64 |
9/16-18 |
33/64 |
|
9/16-12 |
31/64 |
5/8-18 |
34/64 |
|
5/8-11 |
17/32 |
3/4-16 |
11/16 |
|
3/4-10 |
21/32 |
7/8-14 |
13/16 |
|
7/8-9 |
49/64 |
1"-12 |
15/16 |
|
1"-8 |
7/8 |
1-1/8-12 |
1-3/64 |
|
1-1/8-7 |
63/64 |
1-1/4-12 |
1-11/64 |
|
1-1/4-7 |
1-7/64 |
1-1/2-12 |
1-27/64 |
|
1-1/2-6 |
1-11/32 |
1-3/4-12 |
1-43/64 |
|
1-3/4-5 |
1-35/64 |
2"-12 |
1-59/64 |
|
Taper Pipe Sizes - NPT |
Straight Pipe Sizes - NPS |
|||
Tap Size |
Drill Size |
bbb | Tap Size |
Drill Size |
1/8-27 |
R |
1/8-27 |
S |
|
1/4-18 |
7/16 |
1/8-28 |
5/16 |
|
3/8-18 |
37/64 |
1/4-18 |
29/64 |
|
1/2-14 |
23/32 |
3/8-18 |
19/32 |
|
3/4-14 |
59/64 |
1/2-14 |
47/64 |
|
1"-11-1/2 |
1-5/32 |
3/4-14 |
15/16 |
|
1-1/4-11-1/2 |
1-1/2 |
1"-11-1/2 |
1"-3/16 |
|
2"-11-1/2 |
2-7/32 |
1"-1/4-11-1/2 |
1"-33/64 |
|
2"-1/2-8 |
2-5/8 |
1"-1/2-11-1/2 |
1"-3/4 |
|
3"-8 |
3-1/4 |
2"-11-1/2 |
2"-7/32 |
|
3"-1/2-8 |
3-3/4 |
2"-1/2-8 |
2"-21/32 |
|
4"-8 |
4-1/4 |
3"-8 |
3"-9/32 |
|
|
|
3"-1/2-8 |
3"-25/32 |
|
|
|
4"-8 |
4"-9/32 |
|
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