DIN 6923 — Hexagon nuts with flange — ISO 4161
What is the din standard for DIN 6923 — Hexagon nuts with flange — ISO 4161?
For DIN 6923, fastener description is Hexagon nuts with flange; iso equivalent is 4161; en iso number is 1661; interchangeability is Fine thread omitted to be included in a separate standard later); width across flat M10 changed; modification notes is Fine thread omitted to be included in a separate standard later); width across flat M10 changed, verified against its source on 2026-08-12.
Hexagon nuts with flange | 6923 | | 1661 | | 4161 | 1998-02 | Hexagon nuts with flange | Fine thread omitted to be included in a separate standard later); width across flat M10 changed |
— fullerfasteners.com, retrieved 2026-08-12
- DIN standard
- 6923 verified
- Fastener description
- Hexagon nuts with flange verified
- ISO equivalent
- 4161 verified
- EN ISO number
- 1661 verified
- Interchangeability
- Fine thread omitted to be included in a separate standard later); width across flat M10 changed verified
- Modification notes
- Fine thread omitted to be included in a separate standard later); width across flat M10 changed verified
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 Hexagon nuts with flange, as of 2026-08-12.
Hexagon nuts with flange | 6923 | | 1661 | | 4161 | 1998-02 | Hexagon nuts with flange | Fine thread omitted to be included in a separate standard later); width across flat M10 changed |
https://fullerfasteners.com/tech/din-iso-en-crossover-chart/
monsterbolts.com says fastener description is Flange geometry/tolerance., as of 2026-08-12.
DIN 6923 | DIN EN 1661 | Check spec
https://monsterbolts.com/pages/common-din-numbers-for-metric-fasteners
trfastenings.com says fastener description is Hexagon Nuts with flange, as of 2026-08-12.
DIN 6923 | ISO 1661 | | Hexagon Nuts with flange |
https://www.trfastenings.com/knowledge-base/engineering-data/fastener-standards
ISO equivalent
fullerfasteners.com says iso equivalent is 4161, as of 2026-08-12.
Hexagon nuts with flange | 6923 | | 1661 | | 4161 | 1998-02 | Hexagon nuts with flange | Fine thread omitted to be included in a separate standard later); width across flat M10 changed |
https://fullerfasteners.com/tech/din-iso-en-crossover-chart/
monsterbolts.com says iso equivalent is 1661, as of 2026-08-12.
DIN 6923 | DIN EN 1661 | Check spec
https://monsterbolts.com/pages/common-din-numbers-for-metric-fasteners
trfastenings.com says iso equivalent is 1661, as of 2026-08-12.
DIN 6923 | ISO 1661 | | Hexagon Nuts with flange |
https://www.trfastenings.com/knowledge-base/engineering-data/fastener-standards
Interchangeability
fullerfasteners.com says interchangeability is Fine thread omitted to be included in a separate standard later); width across flat M10 changed, as of 2026-08-12.
Hexagon nuts with flange | 6923 | | 1661 | | 4161 | 1998-02 | Hexagon nuts with flange | Fine thread omitted to be included in a separate standard later); 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 6923 | DIN EN 1661 | Check spec
https://monsterbolts.com/pages/common-din-numbers-for-metric-fasteners
Sources
- fullerfasteners.comhttps://fullerfasteners.com/tech/din-iso-en-crossover-chart/
- monsterbolts.comhttps://monsterbolts.com/pages/common-din-numbers-for-metric-fasteners
- trfastenings.comhttps://www.trfastenings.com/knowledge-base/engineering-data/fastener-standards