# DIN 85 · M3.5 · wmin. — Sizes where a DIN fastener and its ISO equivalent are not interchangeable

For DIN 85, size is M3.5; dimension that differs is wmin; iso standard is ISO 1580; din value is 0.9; iso value is 0.8, verified against its source on 2026-10-12.

- **DIN standard:** DIN 85 _(verified: appears in the quote below)_
- **ISO standard:** ISO 1580 _(verified: appears in the quote below)_
- **Size:** M3.5 _(verified: appears in the quote below)_
- **Dimension that differs:** wmin. _(verified: appears in the quote below)_
- **DIN value:** 0.9 _(verified: appears in the quote below)_
- **ISO value:** 0.8 _(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.

> Thread M1.6 M2 M2.5 M3 M3.5 M4 M5 M6 M8 M10 ISO 7045 3.2 4 5 5.6 7 8 9.5 12 16 20 dk max. DIN 7985 3.2 4 5 6 7 8 10 12 16 20 ISO 7045 1.3 1.6 2.1 2.4 2.6 3.1 3.7 4.6 6 7.5 kmax. DIN 7985 1.3 1.6 2 2.4 2.7 3.1 3.8 4.6 6 7.5 ISO 7046-Part 1 + 2* 3 3.8 4.7 5.5 7.3 8.4 9.3 11.3 15.8 18.3 dk max. DIN 965 3 3.8 4.7 5.6 6.5 7.5 9.2 11 14.5 18 ISO 7046-Part 1 + 2* 1 1.2 1.5 1.65 2.35 2.7 2.7 3.3 4.65 5 kmax. DIN 965 0.96 1.2 1.5 1.65 1.93 2.2 2.5 3 4 5 ISO 7047 3 3.8 4.7 5.5 7.3 8.4 9.3 11.3 15.8 18.3 dk max. DIN 966 3 3.8 4.7 5.6 6.5 7.5 9.2 11 14.5 18 ISO 7047 1 1.2 1.5 1.65 2.35 2.7 2.7 3.3 4.65 5 kmax. DIN 966 0.96 1.2 1.5 1.65 1.93 2.2 2.5 3 4 5 ISO 2009 3 3.8 4.7 5.5 7.3 8.4 9.3 11.3 15.8 18.3 dk max. DIN 963 3 3.8 4.7 5.6 6.5 7.5 9.2 11 14.5 18 ISO 2009 1 1.2 1.5 1.65 2.35 2.7 2.7 3.3 4.65 5 kmax. DIN 963 0.96 1.2 1.5 1.65 1.93 2.2 2.5 3 4 5 ISO 2010 3 3.8 4.7 5.5 7.3 8.4 9.3 11.3 15.8 18.3 dk max. DIN 964 3 3.8 4.7 5.6 6.5 7.5 9.2 11 14.5 18 ISO 2010 1 1.2 1.5 1.65 2.35 2.7 2.7 3.3 4.65 5 kmax. DIN 964 0.96 1.2 1.5 1.65 1.93 2.2 2.5 3 4 5 ISO 1207 1.1 1.4 1.8 2.0 2.4 2.6 3.3 3.9 5.0 6.0 dk max. DIN 84 1.0 1.3 1.6 2.0 2.4 2.6 3.3 3.9 5.0 6.0 ISO 1207 0.4 0.5 0.7 0.75 1.0 1.1 1.3 1.6 2.0 2.4 kmax. DIN 84 0.26 0.36 0.56 0.76 0.96 1.06 1.52 1.6 2.2 2.7 ISO 1580 3.2 4 5 5.6 7 8 9.5 12 16 20 dk max. DIN 85 – – – 6 7 8 10 12 16 20 ISO 1580 1 1.3 1.5 1.8 2.1 2.4 3 3.6 4.8 6 kmax. DIN 85 – – – 1.8 2.1 2.4 3 3.6 4.8 6 ISO 1580 0.3 0.4 0.5 0.7 0.8 1 1.2 1.4 1.9 2.4 wmin. DIN 85 – – – 0.7 0.9 1 1.3 1.4 2.1 2.7

## 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/).