METRICcoarse60° flank

M36 × 4 Thread Dimensions

M36 x 4 is a coarse pitch METRIC thread. Pitch is 4 mm, equivalent to 6.35 threads per inch. The recommended tap drill leaves roughly 75% thread engagement.

Nominal Ø36 mm
Pitch4 mm
Threads per inch6.35
Pitch Ø33.4 mm
Tap drill32 mm

Thread profile

millimetres unless stated
Thread profile — M36 x 4d 36d2 33.4d3 31.09mm60°P 4h3 2.45tap ⌀32
M36 × 4 — basic profile60° flank angle · Not to scale
Designation
M36 x 4
Thread system
METRIC
Series
coarse
Flank angle
60°
Major diameter
36 mm / 1.42"
Pitch
4 mm
Threads per inch
6.35
Pitch diameter
33.4 mm
Minor diameter (external)
31.09 mm
Minor diameter (internal)
31.67 mm
Thread depth
2.45 mm
Recommended tap drill
Ø 32 mm / 1.26"

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.