This part of ISO 3601 specifies the inside diameters, cross-sections, tolerances and designation codes for
O-rings used in fluid power systems for general industrial and aerospace applications.
The dimensions and tolerances specified in this part of ISO 3601 are suitable for any elastomeric material,
provided that suitable tooling is available.
NOTE The tooling most commonly available is based on 70 IRHD NBR shrinkage rates (see ISO 48). For materials
that shrink differently from this standard NBR compound, a special mould can be required to maintain the mean diameters
and the tolerance limits listed.
ISO 3601-1:2008 Referenced Document
ISO 3601-3 Fluid power systems — O-rings — Part 3: Quality acceptance criteria
ISO 48 Rubber, vulcanized or thermoplastic - Determination of hardness (hardness between 10 IRHD and 100 IRHD)*, 2010-09-01 Update
ISO 5598 Fluid power systems and components — Vocabulary*, 2020-01-06 Update
ISO 3601-1:2008 history
2019ISO 3601-1:2012/Amd 1:2019 Fluid power systems — O-rings — Part 1: Inside diameters, cross-sections, tolerances and designation codes — Amendment 1
2012ISO 3601-1:2012/cor 1:2012 Fluid power systems - O-rings - Part 1: Inside diameters, cross-sections, tolerances and designation codes; Technical Corrigendum 1
2012ISO 3601-1:2012 Fluid power systems - O-rings - Part 1: Inside diameters, cross-sections, tolerances and designation codes
2009ISO 3601-1:2008/Cor 2:2009 Fluid power systems - O-rings - Part 1: Inside diameters, cross-sections, tolerances and designation codes; Technical Corrigendum 2
2009ISO 3601-1:2008/Cor 1:2009 Fluid power systems - O-rings - Part 1: Inside diameters, cross-sections, tolerances and designation codes; Technical Corrigendum 1
2008ISO 3601-1:2008 Fluid power systems - O-rings - Part 1: Inside diameters, cross-sections, tolerances and designation codes
2002ISO 3601-1:2002 Fluid power systems - O-rings - Part 1: Inside diameters, cross-sections, tolerances and size identification code
1988ISO 3601-1:1988 Fluid systems; sealing devices; O-rings; part 1: inside diameters, cross-sections, tolerances and size identification code
1978ISO 3601-1:1978 Fluid systems — O-rings — Part 1: Inside diameters, cross-sections, tolerances and size identification code