# DIN 971-1 — DIN / ISO / BS fastener equivalents and the sizes where they are not interchangeable

For DIN 971-1, iso standard is ISO 8673; part is Style 1 Hexagon Nuts with metric fine pitch thread; property classes 6 and 8, verified against its source on 2026-08-05.

- **DIN standard:** DIN 971-1 _(verified: appears in the quote below)_
- **ISO standard:** ISO 8673 _(verified: appears in the quote below)_
- **Part:** Style 1 Hexagon Nuts with metric fine pitch thread; property classes 6 and 8 _(verified: appears in the quote below)_

## What the source says

> DIN 971-1 | ISO 8673 | | Style 1 Hexagon Nuts with metric fine pitch thread; property classes 6 and 8 |

## Source

- https://www.trfastenings.com/knowledge-base/engineering-data/fastener-standards

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/).