DIN 3771-1 Fluid systems - O-rings - dimensions
ReplacedNo longer current. Use the replacement shown.
- Edition
- DIN 3771-1:1984-12
- Publisher
- DIN
- Part family
- Seals & O-rings
- Reviewed
- 27 October 2026 · source checked
- Use instead
- DIN ISO 3601-1
Is DIN 3771-1 still current?
No, it has been replaced. DIN 3771-1 has been replaced by DIN ISO 3601-1 (MechAtlas review: 27 October 2026). Use the replacement for new work, and check differences before interchanging parts.
What it covers
Old German O-ring size standard.
Parts that use DIN 3771-1
- O-ring (Germany (DIN), old)
Round-section rubber ring in a groove that seals static or slow-moving joints in hydraulic, pneumatic and pump parts.
Withdrawn, replaced by DIN ISO 3601-1.
Official source
MechAtlas does not reproduce standards. Check the official edition at the publisher's page for DIN 3771-1 or the DIN store.
Open in MechAtlasCheck a drawing callout
Other seals & o-rings standards
- IS 5129 (Part 1) Replaced
Rotary shaft lip type seals - nominal dimensions and tolerances - IS 9975 (Part 1) Replaced
Specification for O-rings - dimensions - API 682 Current
Pump shaft sealing systems - ARPM OS-4 Current
Application guide for radial lip type shaft seals - DIN 3760 Current
Rotary shaft lip seals, types A/AS - DIN 3761 Current
Lip seals, automotive/heavy duty types - DIN ISO 3601-1 Current
O-rings - part 1 (ISO 3601-1:2012 + Amd 1:2019) - EN 12756 Current
Mechanical seal principal dimensions (ex DIN 24960) - IS 17891 Current
Fluid power systems - O-rings (parts 1 to 5) - IS/ISO 6194-1 Current
Rotary shaft lip seals - nominal dimensions and tolerances - ISO 21049 Current
Pump shaft sealing systems - ISO 3601-1 Current
O-ring sizes, tolerances, designation