# 971-1 — Fastener standard equivalences: DIN to ISO / EN crossover

For 971-1, fastener description is Style 1 Hexagon Nuts with metric fine pitch thread; property classes 6 and 8; iso equivalent is 8673, verified against its source on 2026-08-12.

- **DIN standard:** 971-1 _(verified: appears in the quote below)_
- **Fastener description:** Style 1 Hexagon Nuts with metric fine pitch thread; property classes 6 and 8 _(verified: appears in the quote below)_
- **ISO equivalent:** 8673 _(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: 2026-08-12. Review by: 2028-08-11.
Part of [Fastener standard equivalences: DIN to ISO / EN crossover](https://referencesource.org/fastener-thread-standard-equivalence/).