|
Thread Sizes
- Tap Drill Sizes
The following table is provided for your convenience. We
believe that the data presented is reliable, however we make no claim as to the
accuracy of the information.
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Thread Size/ Tap Drill
Size
*Indicates Size of drill to be used before tapping |
| American Standard Thread |
|
ISO Metric Thread |
Thread
Size |
Tap Drill
Size (in.)* |
|
Thread
Size |
Tap Drill
Size(mm)* |
| 0-80 |
3/64 |
|
M1 x 0.25 |
0.75 |
| 1-64 |
53 |
|
M1.1 x 0.25 |
0.85 |
| 1-72 |
53 |
|
M1.2 x 0.25 |
0.95 |
| 2-56 |
51 |
|
M1.4 x 0.3 |
1.10 |
| 2-64 |
50 |
|
M1.6 x 0.35 |
1.25 |
| 3-48 |
5/64 |
|
M1.8 x 0.35 |
1.45 |
| 3-56 |
46 |
|
M2 x 0.4 |
1.60 |
| 4-40 |
43 |
|
M2.2 x 0.45 |
1.75 |
| 4-48 |
42 |
|
M2.5 x 0.45 |
2.05 |
| 5-40 |
39 |
|
M3 x 0.5 |
2.50 |
| 5-44 |
37 |
|
M3.5 x 0.6 |
2.90 |
| 6-32 |
36 |
|
M4 x 0.7 |
3.30 |
| 6-40 |
33 |
|
M4.5 x 0.75 |
3.70 |
| 8-32 |
29 |
|
M5 x 0.8 |
4.20 |
| 8-36 |
29 |
|
M6 x 1 |
5.00 |
| 10-24 |
25 |
|
M7 x 1 |
6.00 |
| 10-32 |
21 |
|
M8 x 1.25 |
6.80 |
| 12-24 |
17 |
|
M9 x 1.25 |
7.80 |
| 12-28 |
15 |
|
M10 x 1.5 |
8.50 |
| 1/4-20 |
7 |
|
M11 x 1.5 |
9.50 |
| 1/4-28 |
3 |
|
M12 x 1.75 |
10.20 |
| 5/16-18 |
F |
|
M14 x 2 |
12.00 |
| 5/16-24 |
I |
|
M16 x 2 |
14.00 |
| 3/8-16 |
5/16 |
|
M18 x 2.5 |
15.50 |
| 3/8-24 |
Q |
|
M20 x 2.5 |
17.50 |
| 7/16-14 |
U |
|
M22 x 2.5 |
19.50 |
| 7/16-20 |
W |
|
M24 x 3 |
21.00 |
| 1/2-13 |
27/64 |
|
M27 x 3 |
24.00 |
| 1/2-20 |
29/64 |
|
M30 x 3.5 |
26.50 |
| 9/16-12 |
31/64 |
|
M33 x 3.5 |
29.50 |
| 9/16-18 |
33/64 |
|
M36 x 4 |
32.00 |
| 5/8-11 |
17/32 |
|
M39 x 4 |
35.00 |
| 5/8-18 |
37/64 |
|
M42 x 4.5 |
37.50 |
| 3/4-10 |
21/32 |
|
M45 x 4.5 |
40.50 |
| 3/4-16 |
11/16 |
|
M48 x 5 |
43.00 |
| 7/8-9 |
49/64 |
|
M52 x 5 |
47.00 |
| 7/8-14 |
13/16 |
|
M56 x 5.5 |
50.50 |
| 1"-8 |
7/8 |
|
M60 x 5.5 |
54.50 |
| 1"-14 |
15/18 |
|
M64 x 6 |
58.00 |
| |
|
|
M68 x 6 |
62.00 |
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