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

For 428, fastener description is Hexagon Nuts, Grade C; iso equivalent is 4034, verified against its source on 2026-08-12.

- **DIN standard:** 428 _(verified: appears in the quote below)_
- **Fastener description:** Hexagon Nuts, Grade C _(verified: appears in the quote below)_
- **ISO equivalent:** 4034 _(verified: appears in the quote below)_

## What the source says

> DIN 428 | ISO 4034 | | Hexagon Nuts, Grade C |

## 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/).