# 439-1 — Fastener standard equivalences: DIN to ISO / EN crossover

For 439-1, fastener description is Hexagon thin nuts with M 1,6 to M 10 threads; iso equivalent is 4036; interchangeability is Correlation of dimensions with DIN 439-1, except for the width across flat of the nut M10; modification notes is Correlation of dimensions with DIN 439-1, except for the width across flat of the nut M10, verified against its source on 2026-08-12.

- **DIN standard:** 439-1 _(verified: appears in the quote below)_
- **Fastener description:** Hexagon thin nuts with M 1,6 to M 10 threads _(verified: appears in the quote below)_
- **ISO equivalent:** 4036 _(verified: appears in the quote below)_
- **Interchangeability:** Correlation of dimensions with DIN 439-1, except for the width across flat of the nut M10 _(verified: appears in the quote below)_
- **Modification notes:** Correlation of dimensions with DIN 439-1, except for the width across flat of the nut M10 _(verified: appears in the quote below)_

## What the source says

> Hexagon thin nuts with M 1,6 to M 10 threads | 439-1 | 4036 | 24036 | 4036 | 4036 | 2001-02 | Hexagon thin nuts (unchamfered) – Product grade B | Correlation of dimensions with DIN 439-1, except for the width across flat of the nut M10 |

## Sources disagree

More than one authority states this, and they do not state the same
thing. Both are reproduced with the source each came from.

### Fastener description

fullerfasteners.com says fastener description is **Hexagon thin nuts with M 1,6 to M 10 threads**, as of 2026-08-12.

> Hexagon thin nuts with M 1,6 to M 10 threads | 439-1 | 4036 | 24036 | 4036 | 4036 | 2001-02 | Hexagon thin nuts (unchamfered) – Product grade B | Correlation of dimensions with DIN 439-1, except for the width across flat of the nut M10 |

Source: https://fullerfasteners.com/tech/din-iso-en-crossover-chart/

trfastenings.com says fastener description is **Unchamfered Hexagon Thin Nuts - product grade B**, as of 2026-08-12.

> DIN 439-1 | ISO 4036 | | Unchamfered Hexagon Thin Nuts - product grade B |

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


## Source

- https://fullerfasteners.com/tech/din-iso-en-crossover-chart/
- 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/).