961
For 961, fastener description is M 8×1 to M 100×4 hexagon head bolts with fine pitch thread; iso equivalent is 8676; interchangeability is Nominal size extended; width across flats according to DIN ISO 272 included; modification notes is Nominal size extended; width across flats according to DIN ISO 272 included, recorded from its source on 2026-08-12.
- DIN standard
- 961 verified
- Fastener description
- M 8×1 to M 100×4 hexagon head bolts with fine pitch thread
- ISO equivalent
- 8676 verified
- Interchangeability
- Nominal size extended; width across flats according to DIN ISO 272 included verified
- Modification notes
- Nominal size extended; width across flats according to DIN ISO 272 included verified
What the source says
961 | 8676 | 28676 | 8676 | 8676 | 2001-03 | Hexagon head screws with metric fine pitch thread – Product grades A and B | Nominal size extended; width across flats according to DIN ISO 272 included |
— 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 M 8×1 to M 100×4 hexagon head bolts with fine pitch thread, as of 2026-08-12.
961 | 8676 | 28676 | 8676 | 8676 | 2001-03 | Hexagon head screws with metric fine pitch thread – Product grades A and B | Nominal size extended; width across flats according to DIN ISO 272 included |
https://fullerfasteners.com/tech/din-iso-en-crossover-chart/
monsterbolts.com says fastener description is Fine thread FT., as of 2026-08-12.
DIN 961 | ISO 8676 | Fully interchangeable
https://monsterbolts.com/pages/common-din-numbers-for-metric-fasteners
trfastenings.com says fastener description is M8x1 to M52x3 Hexagon Head Bolts with fine pitch thread - product grades A and B, as of 2026-08-12.
DIN 961 | ISO 8676 | | M8x1 to M52x3 Hexagon Head Bolts with fine pitch thread - product grades A and B |
https://www.trfastenings.com/knowledge-base/engineering-data/fastener-standards
Interchangeability
fullerfasteners.com says interchangeability is Nominal size extended; width across flats according to DIN ISO 272 included, as of 2026-08-12.
961 | 8676 | 28676 | 8676 | 8676 | 2001-03 | Hexagon head screws with metric fine pitch thread – Product grades A and B | Nominal size extended; width across flats according to DIN ISO 272 included |
https://fullerfasteners.com/tech/din-iso-en-crossover-chart/
monsterbolts.com says interchangeability is Fully interchangeable, as of 2026-08-12.
DIN 961 | ISO 8676 | Fully interchangeable
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