977
For 977, fastener description is Weld bosses/OD differ by series; iso equivalent is 21670; interchangeability is Check spec, recorded from its source on 2026-08-12.
- DIN standard
- 977 verified
- Fastener description
- Weld bosses/OD differ by series.
- ISO equivalent
- 21670 verified
- Interchangeability
- Check spec verified
What the source says
DIN 977 | ISO 21670 | Check spec
— monsterbolts.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
monsterbolts.com says fastener description is Weld bosses/OD differ by series., as of 2026-08-12.
DIN 977 | ISO 21670 | Check spec
https://monsterbolts.com/pages/common-din-numbers-for-metric-fasteners
trfastenings.com says fastener description is Hexagon Weld Nuts with flange, as of 2026-08-12.
DIN 977 | ISO 21670 | | Hexagon Weld Nuts with flange |
https://www.trfastenings.com/knowledge-base/engineering-data/fastener-standards
Sources
- monsterbolts.comhttps://monsterbolts.com/pages/common-din-numbers-for-metric-fasteners
- trfastenings.comhttps://www.trfastenings.com/knowledge-base/engineering-data/fastener-standards