# DIN 439 · M10 · WAF — Sizes where a DIN fastener and its ISO equivalent are not interchangeable

For DIN 439, size is M10; dimension that differs is WAF; iso standard is ISO 4035; din value is 17; iso value is 16, verified against its source on 2026-10-12.

- **DIN standard:** DIN 439 _(verified: appears in the quote below)_
- **ISO standard:** ISO 4035 _(verified: appears in the quote below)_
- **Size:** M10 _(verified: appears in the quote below)_
- **Dimension that differs:** WAF _(verified: appears in the quote below)_
- **DIN value:** 17 _(verified: appears in the quote below)_
- **ISO value:** 16 _(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

## 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/).