# 979 — Fastener standard equivalences: DIN to ISO / EN crossover

For 979, fastener description is Hexagon Thin Slotted Nuts and Castle Nuts with metric coarse and fine pitch thread - Product grades A and B, verified against its source on 2026-08-12.

- **DIN standard:** 979 _(verified: appears in the quote below)_
- **Fastener description:** Hexagon Thin Slotted Nuts and Castle Nuts with metric coarse and fine pitch thread - Product grades A and B _(verified: appears in the quote below)_

## What the source says

> DIN 979 | | | Hexagon Thin Slotted Nuts and Castle Nuts with metric coarse and fine pitch thread - Product grades A and B |

## 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/).