M36 Thread Specs
Standard: ISO 261 (ISO Metric Coarse)
This reference guide outlines the technical dimensions and tapping parameters for the standard M36 metric thread.
Part of the ISO Metric Coarse series defined by ISO 261, the thread features a nominal diameter of 36 mm and a pitch of 4 mm.
For machining or fabrication, the recommended tap drill size is 32 mm (for 75% thread depth) or 32.25 mm (for 65% thread depth).
Dimensional Specifications (mm)
Nominal Diameter
36 mm
Pitch
4 mm
Threads per mm
0.25
Major Diameter
36 mm
Pitch Diameter (d₂)
33.402 mm
Minor Diameter (d₁) Ext
31.67 mm
Minor Diameter (D₁) Int
32.247 mm
Thread Height
3.464 mm
Root Radius
0.577 mm
Drilling & Strength Specs
Tap Drill (75%)
32 mm
Tap Drill (65%)
32.25 mm
Stress Area
816.72 mm²
Stress Diameter
31.093 mm
Recommended Tightening Torque
| Property Class | Dry (Nm) | Lubricated (Nm) |
|---|---|---|
| Class 8.8 | 3120 | 2340 |
| Class 10.9 | 4589 | 3441.8 |
| Class 12.9 | 5507 | 4130.3 |
Quick Unit Converter
mm
⇄
inch
Frequently Asked Questions
What is the tap drill size for a M36 thread?
For standard thread engagement (approx. 75%), the recommended tap drill size for M36 is 32 mm. For a slightly looser 65% thread engagement, a 32.25 mm drill bit is recommended.
What is the pitch of a M36 thread?
The thread pitch for a standard M36 thread is 4 mm, which equates to approximately 0.25 threads per millimeter.
What are the major and pitch diameters for M36?
The nominal major diameter of M36 is 36 mm. The calculated pitch diameter (d₂) is 33.402 mm per the ISO 68-1/ISO 261 standards.