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Cold Forming Taps for Internal Threads
Metric Thread Sizes
Tolerance Grade and Hole Size
|
HOLE SIZES (mm*) WITH PROBABLE ** DRILL SIZES |
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|
6H TOLERANCE GRADE |
4H TOLERANCE GRADE |
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|
Thread Size (mm) |
"MX" No. |
Hole Dia. Minimum |
Probable Drill Size |
"D" No. |
Hole Dia. Minimum |
Probable Drill Size |
|
M1.6x.35 |
5 |
1.456 |
1.45mm |
3 |
1.400 |
1.4mm |
|
M2x.40 |
5 |
1.825 |
1.85mm |
3 |
1.802 |
1.8mm |
|
M2.5x.45 |
6 |
2.319 |
2.35mm |
3 |
2.277 |
2.3mm |
|
M3x.50 |
6 |
2.780 |
2.80mm |
3 |
2.748 |
2.75mm |
|
M3.5x.60 |
7 |
3.232 |
3.25mm |
4 |
3.200 |
3.2mm |
|
M4x.70 |
7 |
3.674 |
3.70mm |
4 |
3.640 |
#27 |
|
M5x.80 |
8 |
4.626 |
4.70mm |
4 |
4.579 |
4.6mm |
|
M6x1.0 |
9 |
5.519 |
5.5mm |
5 |
5.463 |
5.5mm |
|
M6.3x1.0 |
9 |
5.819 |
5.9mm |
5 |
5.763 |
5.8mm |
|
M8x1.25 |
10 |
7.382 |
7.40mm |
5 |
7.290 |
7.3mm |
|
M10x1.50 |
11 |
9.247 |
9.25mm |
6 |
9.174 |
9.2mm |
|
M12x1.75 |
12 |
11.110 |
7/16" |
6 |
11.025 |
11.0,, |
|
M14x2.0 |
14 |
12.983 |
13.0mm |
7 |
12.900 |
SPEC. |
|
M16x2.0 |
14 |
14.983 |
15.0mm |
7 |
14.900 |
SPEC. |
|
M20x2.5 |
15 |
18.705 |
SPEC. |
7 |
18.602 |
47/64" |
|
M24x3.0 |
18 |
22.443 |
SPEC. |
8 |
22.305 |
SPEC. |