| Tap size |
Major Dia (mm) |
Threads per |
Tap Drill (mm) |
Tap Drill (inch) |
Clearance (mm) |
Clearance (inch) |
| M1.6x0.35 |
1.6 |
0.35 |
1.25 |
#55 |
1.8 |
#49 |
| M2x0.4 |
2.0 |
0.40 |
1.60 |
#52 |
2.4 |
#41 |
| M2.5x0.45 |
2.5 |
0.45 |
2.05 |
#46 |
2.9 |
#32 |
| M3x.05 |
3.0 |
0.50 |
2.50 |
#39 |
3.4 |
#29 |
| M3.5x0.6 |
3.5 |
0.60 |
2.90 |
#32 |
3.9 |
#23 |
| M4x0.7 |
4.0 |
0.70 |
3.30 |
#30 |
4.5 |
#16 |
| M5x0.8 |
5.0 |
0.80 |
4.20 |
#19 |
5.5 |
7/32 |
| M6x1 |
6.0 |
1.00 |
5.0 |
#8 |
6.6 |
G |
| M8x1.25 |
8.0 |
1.25 |
6.8 |
H |
9.0 |
T |
| M8x1 |
8.0 |
1.00 |
7.0 |
J |
9.0 |
T |
| M10x1.5 |
10.0 |
1.50 |
8.5 |
R |
12.0 |
31/64 |
| M10x1.25 |
10.0 |
1.25 |
8.8 |
11/32 |
12.0 |
31/64 |
| M12x1.75 |
12.0 |
1.75 |
10.2 |
13/32 |
14.0 |
35/64 |
| M12x1.25 |
12.0 |
1.25 |
10.8 |
27/64 |
14.0 |
35/64 |
| M14x2 |
14.0 |
2.00 |
12.0 |
15/32 |
16.0 |
5/8 |
| M14x1.5 |
14.0 |
1.5 |
12.5 |
1/2 |
16.0 |
5/8 |
| M16x2 |
16.0 |
2.00 |
14.0 |
35/64 |
18.0 |
45/64 |
| M16x1.5 |
16.0 |
1.50 |
14.5 |
37/64 |
18.0 |
45/64 |
| M18x2.5 |
18.0 |
2.50 |
15.5 |
39/64 |
20.0 |
51/64 |
| M18x1.5 |
18.0 |
1.50 |
16.5 |
21/32 |
20.0 |
51/64 |
| M20x2.5 |
20.0 |
2.50 |
17.5 |
11/16 |
22.0 |
7/8 |
| M20x1.5 |
20.0 |
1.50 |
18.5 |
47/64 |
22.0 |
7/8 |
| M22x2.5 |
22.0 |
2.50 |
19.5 |
49/64 |
25.0 |
1 |
| M22x1.5 |
22.0 |
1.50 |
20.5 |
13/16 |
25.0 |
1 |
| M24x3 |
24.0 |
3.00 |
21.0 |
53/64 |
27.0 |
1-5/64 |
| M24x2 |
24.0 |
2.00 |
22.0 |
7/8 |
27.0 |
1-5/64 |
| M27x3 |
27.0 |
3.00 |
24.0 |
15/16 |
30.0 |
1-3/16 |
| M27x2 |
27.0 |
2.0 |
25.0 |
1 |
30.0 |
1-3/16 |
|