Eisen Thread Ring Gauge Tungsten carbide thread ring gauge For metric threads (half-type and single-type) by MSP Metrology (M) Sdn Bhd from Eisen Japan.
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| Type of thread | Pitch | Type of gauge | Class | |
| M3 | 0.5 | coarse | GR/IR (for JIS inspection) |
Ⅱ (JIS Class) |
| 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 | GR/WR (for JIS work) |
6H (ISOClass) |
| M14 | 1.5 | fine | ||
| M14 | 1.25 | fine | ||
| M14 | 1.0 | fine | ||
| M15 | 1.5 | fine | ||
| M16 | 2.0 | coarse | ||
| M16 | 1.5 | fine | ||
| M17 | 1.5 | fine | GR/NR(ISO) | |
| M17 | 1.0 | fine | ||
| M18 | 2.5 | coarse | ||
| M18 | 2 | fine | ||
| M18 | 1.5 | fine | ||
| M18 | 1 | fine | ||
| M20 | 2.5 | coarse | ||
| M20 | 2 | fine | ||
| M20 | 1.5 | fine | ||
| M20 | 1 | fine | ||
| M22 | 2.5 | coarse | ||
| M22 | 2 | fine | ||
| M22 | 1.5 | fine | ||
| M22 | 1 | fine | ||