To tap an M16 thread (pitch 2.0 mm), drill a 14.0 mm hole for standard 6H tolerance. Use 14.3 mm for a looser 7H fit. M16 taps are common in heavy equipment and structural steel connections.
| Tolerance class | Drill diameter | Pitch | Thread depth |
|---|---|---|---|
| 6H (standard) | 14.0 mm | 2.0 mm | 20–26 mm |
| 7H (loose) | 14.3 mm | 2.0 mm | 20–26 mm |
| 4H (tight) | 13.8 mm | 2.0 mm | 20–26 mm |
Fine pitch M16×1.5 variant available in Handbook Locksmith app.
FAQ
14.0 mm drill for standard M16 thread (6H tolerance, pitch 2.0 mm).
Full M16 thread data in the app
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