DIN 6926 — Prevailing torque type hexagon nuts with flange (with non-metallic insert), with metric fine pitch thread — ISO 12125

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 — deciding between them is yours, not ours.

Fastener description

fullerfasteners.com says fastener description is Prevailing torque type hexagon nuts with flange (with non-metallic insert), with metric fine pitch thread, as of 2026-08-12.

6926 | | 1666 | | 12125 | 1998-02 | Prevailing torque type hexagon nuts with flange (with non-metallic insert), with metric fine pitch thread | Width across flat M10 changed |

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

monsterbolts.com says fastener description is Deformation style/serrations differ., as of 2026-08-12.

DIN 6926 | DIN EN 1663, 1666 | Check spec

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

trfastenings.com says fastener description is Prevailing torque type Hexagon Nuts with flange and with non-metallic insert, as of 2026-08-12.

DIN 6926 | ISO 7043 | | Prevailing torque type Hexagon Nuts with flange and with non-metallic insert | DIN 6926 | ISO 12125 |

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

trfastenings.com says fastener description is Prevailing torque type Hexagon Nuts with flange and with non-metallic insert, as of 2026-08-12.

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

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

ISO equivalent

fullerfasteners.com says iso equivalent is 12125, as of 2026-08-12.

6926 | | 1666 | | 12125 | 1998-02 | Prevailing torque type hexagon nuts with flange (with non-metallic insert), with metric fine pitch thread | Width across flat M10 changed |

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

monsterbolts.com says iso equivalent is 1663, 1666, as of 2026-08-12.

DIN 6926 | DIN EN 1663, 1666 | Check spec

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

trfastenings.com says iso equivalent is 12125, as of 2026-08-12.

DIN 6926 | ISO 7043 | | Prevailing torque type Hexagon Nuts with flange and with non-metallic insert | DIN 6926 | ISO 12125 |

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

trfastenings.com says iso equivalent is 7043, as of 2026-08-12.

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

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

Interchangeability

fullerfasteners.com says interchangeability is Width across flat M10 changed, as of 2026-08-12.

6926 | | 1666 | | 12125 | 1998-02 | Prevailing torque type hexagon nuts with flange (with non-metallic insert), with metric fine pitch thread | Width across flat M10 changed |

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

monsterbolts.com says interchangeability is Check spec, as of 2026-08-12.

DIN 6926 | DIN EN 1663, 1666 | Check spec

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