# DIN 439 — DIN / ISO / BS fastener equivalents and the sizes where they are not interchangeable

For DIN 439, iso standard is ISO 4035, 4036; part is Hex Nut – Thin; interchangeability verdict is Fully interchangeable, verified against its source on 2026-08-05.

- **DIN standard:** DIN 439 _(verified: appears in the quote below)_
- **ISO standard:** ISO 4035, 4036 _(verified: appears in the quote below)_
- **Part:** Hex Nut – Thin _(verified: appears in the quote below)_
- **Interchangeability verdict:** Fully interchangeable _(verified: appears in the quote below)_

## What the source says

> Hex Nut – Thin | DIN 439 | ISO 4035, 4036 | Fully interchangeable | Chamfered/unchamfered covered by ISO pair.

## Source

- https://monsterbolts.com/pages/common-din-numbers-for-metric-fasteners

Last verified: 2026-08-05. Review by: 2029-08-04.
Part of [DIN / ISO / BS fastener equivalents and the sizes where they are not interchangeable](https://referencesource.org/fastener-standard-interchangeability-exceptions/).