---
title: "M4×0.7 tap drill 3.3 mm, clearance 4.3 mm"
description: "M4×0.7: tap drill 3.3 mm, clearance hole 4.3 mm, 7 mm hex. Full thread dimensions, how to identify it, and torque."
url: https://atoneplace.net/fastener/m4-0-7/
site: "At One Place"
---

# M4×0.7 thread

**M4×0.7 tap drill: 3.3 mm**

Clearance hole 4.3 mm · 7 mm hex

M4×0.7 is a coarse metric thread with a 4 mm (0.157") major diameter and 0.7 mm pitch. Tap it with a 3.3 mm drill; drill 4.3 mm to pass a bolt through.

## The numbers

- **Designation:** M4×0.7
- **Major diameter:** 4 mm / 0.157"
- **Minor diameter:** 3.242 mm
- **Pitch:** 0.7 mm pitch
- **Tap drill (75% thread):** 3.3 mm — 3.3 mm
- **Clearance hole (close fit):** 4.3 mm / 0.169"
- **Hex across flats:** 7 mm

## How to measure what you have

1. Measure across the thread crests with calipers. A used M4×0.7 reads a little under 4 mm — the crests are truncated by the standard, then worn and plated, so anything from about 3.6 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 0.7 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: 2.5–3.4 N·m**

1.8–2.5 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

- VESA 75×75 and 100×100 monitor mounts
- Enclosure lids and small equipment covers
- Ikea and flat-pack fittings
- Panel-mount switches and connectors

## Common questions

### What size drill for an M4×0.7 tap?

3.3 mm (3.3 mm), which gives about 75% thread engagement.

### What clearance hole for M4×0.7?

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

### What spanner fits M4×0.7?

7 mm across the flats on a standard hex head.

## Related pages

- [M3.5×0.6](https://atoneplace.net/fastener/m3-5-0-6/)
- [M3×0.5](https://atoneplace.net/fastener/m3-0-5/)
- [M5×0.8](https://atoneplace.net/fastener/m5-0-8/)
- [M2.5×0.45](https://atoneplace.net/fastener/m2-5-0-45/)
- [M2×0.4](https://atoneplace.net/fastener/m2-0-4/)
- [M6×1](https://atoneplace.net/fastener/m6-1/)
- [M6×0.75](https://atoneplace.net/fastener/m6-0-75/)
- [M1.6×0.35](https://atoneplace.net/fastener/m1-6-0-35/)
- [M8×1.25](https://atoneplace.net/fastener/m8-1-25/)
- [M8×1](https://atoneplace.net/fastener/m8-1/)

## Sources

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