Metric Thread Formers Tolerances & Hole Sizes
| TAP SIZE |
PITCH DIAMETER LIMIT |
PROBABLE DRILL SIZE |
TAP SIZE |
PITCH DIAMETER LIMIT |
PROBABLE DRILL SIZE |
| CLASS 6H FIT |
CLASS 4H FIT |
| M2X0.4 |
D5 |
1.85mm |
M2X0.4 |
D3 |
1.80mm |
| M2.5X0.45 |
D6 |
2.35mm |
M2.5X0.45 |
D3 |
2.30mm |
| M3X0.5 |
D6 |
2.80mm |
M3X0.5 |
D3 |
2.75mm |
| M3.5X0.6 |
D7 |
3.25mm |
M3.5X0.6 |
D4 |
3.20mm |
| M4X0.7 |
D7 |
3.70mm |
M4X0.7 |
D4 |
#27 |
| M5X0.8 |
D8 |
4.70mm |
M5X0.8 |
D4 |
4.60mm |
| M6X1.0 |
D9 |
5.50mm |
M6X1.0 |
D5 |
5.50mm |
| M8X1.25 |
D10 |
7.40mm |
M8X1.25 |
D5 |
7.30mm |
| M10X1.5 |
D11 |
9.25mm |
M10X1.5 |
D6 |
9.20mm |
To convert millimeters to inches, multiply by .03937