Details of series
Notation Example
Metric Thread Gauge Tolerance Zones
Steel thread plug gauge for metric threads
| Type of thread |
Pitch |
Type of gauge |
Class |
| M1.4 |
0.3 |
coarse |
GPIP(for JIS inspection)
GPWP(for JIS work)
GPNP（ISO） |
Ⅱ（JISClass）
6H （ISOClass）
※M1.4[5H] |
| M1.6 |
0.35 |
coarse |
| M1.7 |
0.35 |
coarse |
| M1.8 |
0.35 |
coarse |
| M2 |
0.4 |
coarse |
| M2.3 |
0.4 |
coarse |
| M2.5 |
0.45 |
coarse |
| M2.6 |
0.45 |
coarse |
| M3 |
0.5 |
coarse |
| M4 |
0.7 |
coarse |
| M5 |
0.8 |
coarse |
| M6 |
1.0 |
coarse |
| M7 |
1.0 |
coarse |
| M8 |
1.25 |
coarse |
| M8 |
1.0 |
fine |
| M10 |
1.5 |
coarse |
| M10 |
1.25 |
fine |
| M10 |
1.0 |
fine |
| M12 |
1.75 |
coarse |
| M12 |
1.5 |
fine |
| M12 |
1.25 |
fine |
| M14 |
2.0 |
coarse |
| M14 |
1.5 |
fine |
| M16 |
2.0 |
coarse |
| M16 |
1.5 |
fine |
| M18 |
2.5 |
coarse |
| M18 |
1.5 |
fine |
| M20 |
2.5 |
coarse |
| M20 |
1.5 |
fine
|