---
title: "M36×4 tap drill 32 mm, clearance 37 mm"
description: "M36×4: tap drill 32 mm, clearance hole 37 mm, 55 mm hex. Full thread dimensions, how to identify it, and torque."
url: https://atoneplace.net/fastener/m36-4/
site: "At One Place"
---

# M36×4 thread

**M36×4 tap drill: 32 mm**

Clearance hole 37 mm · 55 mm hex

M36×4 is a coarse metric thread with a 36 mm (1.417") major diameter and 4 mm pitch. Tap it with a 32 mm drill; drill 37 mm to pass a bolt through.

## The numbers

- **Designation:** M36×4
- **Major diameter:** 36 mm / 1.417"
- **Minor diameter:** 31.67 mm
- **Pitch:** 4 mm pitch
- **Tap drill (75% thread):** 32 mm — 32 mm
- **Clearance hole (close fit):** 37 mm / 1.457"
- **Hex across flats:** 55 mm

## How to measure what you have

1. Measure across the thread crests with calipers. A used M36×4 reads a little under 36 mm — the crests are truncated by the standard, then worn and plated, so anything from about 35.6 mm up is consistent with this size.
2. Measure the pitch: put a rule against the threads and count the distance over ten crests, then divide by ten. This one should give 4 mm.
3. A thread pitch gauge settles it in seconds and costs very little. Guessing between a coarse and a fine thread of the same diameter is the usual way a thread gets stripped.

## Tightening torque

**Typical torque: 2300–2800 N·m**

1696.7–2065.6 lb·ft

> Plain steel property class 8.8 or SAE grade 5, dry threads, tightened to about 65% of yield. Lubricated threads reach the same preload at 20-30% less torque. Where the manufacturer publishes a figure — spark plugs, wheel nuts, cylinder heads — use theirs.

## Where this size turns up

- Wind turbine foundation and tower bolts
- Bridge bearing and expansion-joint anchors
- Very large flange connections

## Common questions

### What size drill for an M36×4 tap?

32 mm (32 mm), which gives about 75% thread engagement.

### What clearance hole for M36×4?

37 mm for a close fit — enough to pass the bolt without slop.

### What spanner fits M36×4?

55 mm across the flats on a standard hex head.

## Related pages

- [M33×3.5](https://atoneplace.net/fastener/m33-3-5/)
- [M30×3.5](https://atoneplace.net/fastener/m30-3-5/)
- [M42×4.5](https://atoneplace.net/fastener/m42-4-5/)
- [M30×2](https://atoneplace.net/fastener/m30-2/)
- [M27×3](https://atoneplace.net/fastener/m27-3/)
- [M27×2](https://atoneplace.net/fastener/m27-2/)
- [M24×3](https://atoneplace.net/fastener/m24-3/)
- [M48×5](https://atoneplace.net/fastener/m48-5/)
- [M24×2](https://atoneplace.net/fastener/m24-2/)
- [M24×1.5](https://atoneplace.net/fastener/m24-1-5/)

## Sources

- Official vendor product documentation — At One Place (/about/)
- Typical range compiled from manufacturer specifications — At One Place (/about/)