METRICcoarse60° flank
M64 × 6 Thread Dimensions
M64 x 6 is a coarse pitch METRIC thread. Pitch is 6 mm, equivalent to 4.23 threads per inch. The recommended tap drill leaves roughly 75% thread engagement.
Nominal Ø64 mm
Pitch6 mm
Threads per inch4.23
Pitch Ø60.1 mm
Tap drill58 mm
Thread profile
millimetres unless stated- Designation
- M64 x 6
- Thread system
- METRIC
- Series
- coarse
- Flank angle
- 60°
- Major diameter
- 64 mm / 2.52"
- Pitch
- 6 mm
- Threads per inch
- 4.23
- Pitch diameter
- 60.1 mm
- Minor diameter (external)
- 56.64 mm
- Minor diameter (internal)
- 57.5 mm
- Thread depth
- 3.68 mm
- Recommended tap drill
- Ø 58 mm / 2.28"
How these values are derived
Basic ISO thread geometry uses the fundamental triangle height H = 0.866025 × P. External minor diameter d₃ = d − 1.226869 × P, internal minor diameter D₁ = d − 1.082532 × P. Tap drill is given as nominal diameter minus pitch, which approximates a 75% thread engagement — adjust for tough materials or deep holes.