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Designation calculator

M12x1.5-6g in, every dimension out.

A designation is a prefix (M, MJ, or Tr), a nominal diameter, an optional pitch -- required for fine and trapezoidal sizes, assumed coarse for M/MJ otherwise -- and, for M and MJ, an optional tolerance class: a grade digit for how wide the tolerance zone is, and a letter for how far it sits from the basic size. Type any of it below.

MØ12 mmP 1.5 mm6g

Small allowance -- the common general-purpose external class.

Try “M12x1.5-6g”, “M8” (coarse pitch assumed), “MJ6-4h6h”, or “Tr20x4-8H”. Add “-LH” for a left-hand thread.

Calculated live

Pitch diameter limits10.859 mm10.994 mmBasic 11.026 mm, allowance -0.032 mm
Major diameter
12.000 mm
Pitch diameter
11.026 mm
Minor diameter
10.376 mm
Maximum
11.969 mm
Minimum
per ISO 965-1 tables
Tap drill
10.75 mm (10.782 mm calculated)
Clearance drill (normal)
12.75 mm (12.800 mm calculated)