ISO 7091 Plain washers, normal series, grade C
ChangingA new edition or revision is being prepared. Check before you specify.
- Edition
- ISO 7091:2000
- Publisher
- ISO
- Part family
- Fasteners & threads
- Reviewed
- 27 October 2026 · source checked
Is ISO 7091 still current?
Yes, but a revision is coming. It is still in use, but a revision is in progress. The current reference is ISO 7091:2000 (MechAtlas review: 27 October 2026). Check the publisher before you specify it.
What it covers
Rougher, lower-grade flat washers.
Parts that use ISO 7091
- Flat washer (ISO / EN, related)
Thin flat ring placed under a nut or bolt head to spread load and protect the surface.
Normal series, product grade C (rougher).
Official source
MechAtlas does not reproduce standards. Check the official edition at the publisher's page for ISO 7091 or the ISO store.
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Other fasteners & threads standards
- DIN 125-1 Replaced
Washers, product grade A, up to 250 HV - DIN 1481 Replaced
Heavy spring pins (old) - DIN 2999-1 Replaced
Whitworth pipe threads (old) - DIN 6325 Replaced
Hardened parallel pins m6 (old) - DIN 6914 Replaced
HV hex bolts for steel structures (old) - DIN 7 Replaced
Parallel pins (old) - DIN 7337 Replaced
Break mandrel blind rivets (old) - DIN 7991 Replaced
Hexagon socket countersunk head screws - DIN 9021 Replaced
Washers, outside diameter about 3 x thread - DIN 912 Replaced
Hexagon socket head cap screws (ISO 4762 modified) - DIN 913 Replaced
Hexagon socket set screws, flat point (ISO 4026 modified) - DIN 916 Replaced
Hexagon socket set screws, cup point (ISO 4029 modified)