| |
| 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 |
| Thread Size |
Tap Drill Size
(in.) |
...... |
Thread Size |
Tap Drill
Size(mm) |
| 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 |
| Thread Size |
Tap Drill Size
(in.) |
...... |
Thread Size |
Tap Drill
Size(mm) |
| 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 |
| Thread Size |
Tap Drill Size
(in.) |
...... |
Thread Size |
Tap Drill
Size(mm) |
| 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"-12 |
59/64 |
|
M64 x 6 |
58.00 |
|
|
|
M68 x 6 |
62.00 |
|
