# DIN 934 · M39 · Height (mm) — Sizes where a DIN fastener and its ISO equivalent are not interchangeable

For DIN 934, size is M39; dimension that differs is Height (mm); iso standard is ISO 4032; din value is 31; iso value is 33.4, verified against its source on 2026-10-12.

- **DIN standard:** DIN 934 _(verified: appears in the quote below)_
- **ISO standard:** ISO 4032 _(verified: appears in the quote below)_
- **Size:** M39 _(verified: appears in the quote below)_
- **Dimension that differs:** Height (mm) _(verified: appears in the quote below)_
- **DIN value:** 31 _(verified: appears in the quote below)_
- **ISO value:** 33.4 _(verified: appears in the quote below)_

## What the source says

**ISO standard, DIN value and ISO value:** The source prints these values inside the passage below but does not name them there. The passage shows where each one appears; what ties them to this record is the position on the page, not anything the passage says.

> Standard DIN 934 ISO 4032 DIN 439 ISO 4035 Height (mm) WAF Height (mm) WAF Height (mm) WAF Height (mm) WAF Nominal Ø m max. (mm) m max. (mm) m max. (mm) m max. (mm) M1 0.8 2.5 – – – – – – M1.2 1 3 – – – – – – M1.4 1.2 3 – – – – – – M1.6 1.3 3.2 1.3 3.2 1 3.2 1 3.2 M2 1.6 4 1.6 4 1.2 4 1.2 4 M2.5 2 5 2 5 1.6 5 1.6 5 M3 2.4 5.5 2.4 5.5 1.8 5.5 1.8 5.5 M3.5 2.8 6 2.8 6 2 6 2 6 M4 3.2 7 3.2 7 2.2 7 2.2 7 M5 4 8 4.7 8 2.7 8 2.7 8 M6 5 10 5.2 10 3.2 10 3.2 10 M8 6.5 13 6.8 13 4 13 4 13 M10 8 17 8.4 16 5 17 5 16 M12 10 19 10.8 18 6 19 6 18 M14 11 22 12.8 21 7 22 7 21 M16 13 24 14.8 24 8 24 8 24 M18 15 27 15.8 27 9 27 9 27 M20 16 30 18 30 10 30 10 30 M22 18 32 19.4 34 11 32 11 34 M24 19 36 21.5 36 12 36 12 36 M27 22 41 23.8 41 13.5 41 13.5 41 M30 24 46 25.6 46 15 46 15 46 M33 26 50 28.7 50 16.5 50 16.5 50 M36 29 55 31 55 18 55 18 55 M39 31 60 33.4 60 19.5 60 19.5 60

## Source

- https://www.wurthindustry.ca/media/downloads/wic_pdfs/Fasteners_DIN-EN-ISO_Standards.pdf

Last verified: 2026-10-12. Review by: 2029-10-11.
Part of [Sizes where a DIN fastener and its ISO equivalent are not interchangeable](https://referencesource.org/fastener-standard-interchangeability-exceptions/).