Threads / Size reference
M64x6 Metric coarse
M64x6 has a nominal outside diameter of 64 mm and a 6 mm pitch.
2.519685 in
4.233333 TPI · calculated
Nominal dimensions; no class allowances or acceptance limits applied. M sizes state diameter and pitch in millimetres.
nearby diameter comparison
M64x6 vs M56x5.5
There is no second pitch at this diameter in the directory. Compare the nearby M56x5.5 Metric coarse: its nominal diameter differs by 8 mm. It is not a replacement.
Swipe to compare both sizes →
| Property | M64x6 Metric coarse | M56x5.5 Metric coarse |
|---|---|---|
| Nominal diameter · inDifferent | 2.519685 | 2.204724 |
| Nominal diameter · mmDifferent | 64 | 56 |
| Threads per inchDifferent | 4.233333 | 4.618182 |
| Pitch · mmDifferent | 6 | 5.5 |
Tapping-hole evidence for M64x6
No reviewed chart row for M64x6 Metric coarse
You can calculate a theoretical hole with the cited equation. It is not a stocked-drill selection or a tool-specific hole range.
Need acceptance limits?
The complete class and applicable drawing requirements are needed. These nominal values are not maximum/minimum inspection limits.
Part has no marking?
Measure the correct diameter and pitch, then compare candidates across metric and inch systems.
Basis for this size
Nominal designation and family transcribed from the live directory on 2026-10-19; unit conversions are calculated using exactly 25.4 mm/in. No matching drill row has been reviewed for this exact size. Paid standard limit tables have not been reviewed.
ISO 261 · metric general plan ↗ · Guhring · Tap Drill Sizes ↗ Full source scope →