Tap size | Basic
major dia (mm) |
Basic
major dia (inch) |
mm per thread | Drill
size (mm) |
Drill
size (inch) |
M1.6 x 0.35 |
1,6mm |
.0630 |
.35 |
1,25mm |
#55 |
M2 x 0.4 |
2mm |
.0787 |
.4 |
1,6mm |
#52 |
M2.5 x 0.45 |
2,5mm |
.0984 |
.45 |
2,05mm |
#46 |
M3 x 0.5 |
3mm |
.1181 |
.5 |
2,5mm |
#39 |
M3.5 x 0.6 |
3,5mm |
.1378 |
.6 |
2,9mm |
#32 |
M4 x 0.7 |
4mm |
.1575 |
.7 |
3,3mm |
#30 |
M5 x 0.8 |
5mm |
.1969 |
.8 |
4,2mm |
#19 |
M6 x 1 |
6mm |
.2362 |
1 |
5mm |
#8 |
M8 x 1.25 |
8mm |
.3150 |
1.25 |
6,8mm |
H |
M8 x 1 |
8mm |
.3150 |
1 |
7mm |
J |
M10 x 1.5 |
10mm |
.3937 |
1.5 |
8,5mm |
R |
M10 x 1.25 |
10mm |
.3937 |
1.25 |
8,8mm |
11/32 |
M12 x 1.75 |
12mm |
.4724 |
1.75 |
10,2mm |
13/32 |
M12 x 1.25 |
12mm |
.4724 |
1.25 |
10,8mm |
27/64 |
M14 x 2 |
14mm |
.5512 |
2 |
12mm |
15/32 |
M14 x 1.5 |
14mm |
.5512 |
1.5 |
12,5mm |
1/2 |
M16 x 2 |
16mm |
.6299 |
2 |
14mm |
35/64 |
M16 x 1.5 |
16mm |
.6299 |
1.5 |
14,5mm |
37/64 |
M18 x 2.5 |
18mm |
.7087 |
2.5 |
15,5mm |
39/64 |
M18 x 1.5 |
18mm |
.7087 |
1.5 |
16,5mm |
21/32 |
M20 x 2.5 |
20mm |
.7874 |
2.5 |
17,5mm |
11/16 |
M20 x 1.5 |
20mm |
.7874 |
1.5 |
18,5mm |
47/64 |
M22 x 2.5 |
22mm |
.8661 |
2.5 |
19,5mm |
49/64 |
M22 x 1.5 |
22mm |
.8661 |
1.5 |
20,5mm |
13/16 |
M24 x 3 |
24mm |
.9449 |
3 |
21mm |
53/64 |
M24 x 2 |
24mm |
.9449 |
2 |
22mm |
7/8 |
M27 x 3 |
27mm |
1.0630 |
3 |
24mm |
15/16 |
M27 x 2 |
27mm |
1.0630 |
2 |
25mm |
1 |