555
For 555, fastener description is Hexagon nuts; Metric Thread, Type g; iso equivalent is 4034; interchangeability is Width across flats according to DIN ISO 272 included; nominal diameter reduced; modification notes is Width across flats according to DIN ISO 272 included; nominal diameter reduced, verified against its source on 2026-08-12.
- DIN standard
- 555 verified
- Fastener description
- Hexagon nuts; Metric Thread, Type g verified
- ISO equivalent
- 4034 verified
- Interchangeability
- Width across flats according to DIN ISO 272 included; nominal diameter reduced verified
- Modification notes
- Width across flats according to DIN ISO 272 included; nominal diameter reduced verified
What the source says
Hexagon nuts; Metric Thread, Type g | 555 | 4034 | 24034 | 4034 | 4034 | 2001-03 | Hexagon nuts – Product grade C | Width across flats according to DIN ISO 272 included; nominal diameter reduced |
— fullerfasteners.com, retrieved 2026-08-12
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; Metric Thread, Type g, as of 2026-08-12.
Hexagon nuts; Metric Thread, Type g | 555 | 4034 | 24034 | 4034 | 4034 | 2001-03 | Hexagon nuts – Product grade C | Width across flats according to DIN ISO 272 included; nominal diameter reduced |
https://fullerfasteners.com/tech/din-iso-en-crossover-chart/
trfastenings.com says fastener description is M5 to M100x6 Hexagon Nuts - product grade C, as of 2026-08-12.
DIN 555 | ISO 4034 | | M5 to M100x6 Hexagon Nuts - product grade C |
https://www.trfastenings.com/knowledge-base/engineering-data/fastener-standards
Sources
- fullerfasteners.comhttps://fullerfasteners.com/tech/din-iso-en-crossover-chart/
- trfastenings.comhttps://www.trfastenings.com/knowledge-base/engineering-data/fastener-standards