9021

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 Washers; outside diameter ˜ 3 x bolt diameter, as of 2026-08-12.

Washers; outside diameter ˜ 3 x bolt diameter | 9021 | 7093-1 | | | 7093-1 | 2000-11 | Plain washers – Large series – Part 1: Product grade A | Dimensions partially changed |

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

fullerfasteners.com says fastener description is Washers; outside diameter approx. 3 x bolt diameter, as of 2026-08-12.

9021 | 7093-1 | | | 7093-1 | 2000-11 | Plain washers – Large series – Part 1: Product grade A | Dimensions partially changed | Washers; outside diameter approx. 3 x bolt diameter | 9021 | 7093-2 |

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

monsterbolts.com says fastener description is Large OD series., as of 2026-08-12.

DIN 9021 | ISO 7093 | Fully interchangeable

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

trfastenings.com says fastener description is Plain Washers with large outside diameter, as of 2026-08-12.

DIN 9021 | ISO 7093 | | Plain Washers with large outside diameter |

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

ISO equivalent

fullerfasteners.com says iso equivalent is 7093-1, as of 2026-08-12.

Washers; outside diameter ˜ 3 x bolt diameter | 9021 | 7093-1 | | | 7093-1 | 2000-11 | Plain washers – Large series – Part 1: Product grade A | Dimensions partially changed |

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

fullerfasteners.com says iso equivalent is 7093-2, as of 2026-08-12.

9021 | 7093-1 | | | 7093-1 | 2000-11 | Plain washers – Large series – Part 1: Product grade A | Dimensions partially changed | Washers; outside diameter approx. 3 x bolt diameter | 9021 | 7093-2 |

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

monsterbolts.com says iso equivalent is 7093, as of 2026-08-12.

DIN 9021 | ISO 7093 | Fully interchangeable

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

trfastenings.com says iso equivalent is 7093, as of 2026-08-12.

DIN 9021 | ISO 7093 | | Plain Washers with large outside diameter |

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

Interchangeability

fullerfasteners.com says interchangeability is Dimensions partially changed, as of 2026-08-12.

Washers; outside diameter ˜ 3 x bolt diameter | 9021 | 7093-1 | | | 7093-1 | 2000-11 | Plain washers – Large series – Part 1: Product grade A | Dimensions partially changed |

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

fullerfasteners.com says interchangeability is Dimensions partially changed, as of 2026-08-12.

9021 | 7093-1 | | | 7093-1 | 2000-11 | Plain washers – Large series – Part 1: Product grade A | Dimensions partially changed | Washers; outside diameter approx. 3 x bolt diameter | 9021 | 7093-2 |

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

monsterbolts.com says interchangeability is Fully interchangeable, as of 2026-08-12.

DIN 9021 | ISO 7093 | Fully interchangeable

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