# DIN 6926 — DIN / ISO / BS fastener equivalents and the sizes where they are not interchangeable

For DIN 6926, iso standard is DIN EN 1663, 1666; part is Prevailing Torque Flange Nut; interchangeability verdict is Check spec, verified against its source on 2026-08-05.

- **DIN standard:** DIN 6926 _(verified: appears in the quote below)_
- **ISO standard:** DIN EN 1663, 1666 _(verified: appears in the quote below)_
- **Part:** Prevailing Torque Flange Nut _(verified: appears in the quote below)_
- **Interchangeability verdict:** Check spec _(verified: appears in the quote below)_

## What the source says

> Prevailing Torque Flange Nut | DIN 6926 | DIN EN 1663, 1666 | Check spec | Deformation style/serrations differ.

## 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.

### ISO standard

monsterbolts.com says iso standard is **DIN EN 1663, 1666**, as of 2026-08-05.

> Prevailing Torque Flange Nut | DIN 6926 | DIN EN 1663, 1666 | Check spec | Deformation style/serrations differ.

Source: https://monsterbolts.com/pages/common-din-numbers-for-metric-fasteners

trfastenings.com says iso standard is **ISO 7043**, as of 2026-08-05.

> DIN 6926 | ISO 7043 | | Prevailing torque type Hexagon Nuts with flange and with non-metallic insert |

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


### Part

monsterbolts.com says part is **Prevailing Torque Flange Nut**, as of 2026-08-05.

> Prevailing Torque Flange Nut | DIN 6926 | DIN EN 1663, 1666 | Check spec | Deformation style/serrations differ.

Source: https://monsterbolts.com/pages/common-din-numbers-for-metric-fasteners

trfastenings.com says part is **Prevailing torque type Hexagon Nuts with flange and with non-metallic insert**, as of 2026-08-05.

> DIN 6926 | ISO 7043 | | Prevailing torque type Hexagon Nuts with flange and with non-metallic insert |

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


## Source

- https://monsterbolts.com/pages/common-din-numbers-for-metric-fasteners
- 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/).