Housing dimensions

O-Ring Radial installation Axial installation Radius
Cross-Section-Ø Housing depth Groove width Groove depth Groove width
d2 Dynamic
     (t)		 Static
     (t)		 b1 +0.25 h +0.1 b4 +0.2 r ±0.2
mm
0.50 - 0.35 0.80 0.35 0.80 0.20
0.74 - 0.50 1.00 0.50 1.00 0.20
1.00 - 0.70 1.40 0.70 1.40 0.20
1.02 - 0.70 1.40 0.70 1.40 0.20
1.20 - 0.85 1.70 0.85 1.70 0.20
1.25 - 0.90 1.70 0.90 1.80 0.20
1.27 - 0.90 1.70 0.90 1.80 0.20
1.30 - 0.95 1.80 0.95 1.80 0.20
1.42 - 1.05 1.90 1.05 2.00 0.30
1.50 1.25 1.10 2.00 1.10 2.10 0.30
1.52 1.25 1.10 2.00 1.10 2.10 0.30
1.60 1.30 1.20 2.10 1.20 2.20 0.30
1.63 1.30 1.20 2.10 1.20 2.20 0.30
1.78* 1.45 1.30 2.40 1.30 2.60 0.30
1.80 1.45 1.30 2.40 1.30 2.60 0.30
1.83 1.50 1.35 2.50 1.35 2.60 0.30
1.90 1.55 1.40 2.60 1.40 2.70 0.30
1.98 1.65 1.50 2.70 1.50 2.80 0.30
2.00 1.65 1.50 2.70 1.50 2.80 0.30
2.08 1.75 1.55 2.80 1.55 2.90 0.30
2.10 1.75 1.55 2.80 1.55 2.90 0.30
2.20 1.85 1.60 3.00 1.60 3.00 0.30
2.26 1.90 1.70 3.00 1.70 3.10 0.30
2.30 1.95 1.75 3.10 1.75 3.10 0.30
2.34 1.95 1.75 3.10 1.75 3.10 0.30
2.40 2.05 1.80 3.20 1.80 3.30 0.30
2.46 2.10 1.85 3.30 1.85 3.40 0.30
2.50 2.15 1.90 3.30 1.90 3.40 0.30
2.62* 2.25 2.00 3.60 2.00 3.80 0.30
2.65 2.25 2.00 3.60 2.00 3.80 0.30
2.70 2.30 2.05 3.60 2.05 3.80 0.30
2.80 2.40 2.10 3.70 2.10 3.90 0.60
2.92 2.50 2.20 3.90 2.20 4.00 0.60
2.95 2.50 2.20 3.90 2.20 4.00 0.60
3.00 2.60 2.30 4.00 2.30 4.00 0.60
3.10 2.70 2.40 4.10 2.40 4.10 0.60
3.50 3.05 2.65 4.60 2.65 4.70 0.60
3.53* 3.10 2.70 4.80 2.70 5.00 0.60
3.55 3.10 2.70 4.80 2.70 5.00 0.60
3.60 3.15 2.80 4.80 2.80 5.10 0.60
4.00 3.50 3.10 5.20 3.10 5.30 0.60
4.50 4.00 3.50 5.80 3.50 5.90 0.60
5.00 4.40 4.00 6.60 4.00 6.70 0.60
5.30 4.70 4.30 7.10 4.30 7.30 0.60
5.33* 4.70 4.30 7.10 4.30 7.30 0.60
5.50 4.80 4.50 7.10 4.50 7.30 0.60
5.70 5.00 4.60 7.20 4.60 7.40 0.60
6.00 5.30 4.90 7.40 4.90 7.60 0.60
6.50 5.70 5.40 8.00 5.40 8.20 1.00
6.99* 6.10 5.80 9.50 5.80 9.70 1.00
7.00 6.10 5.80 9.50 5.80 9.70 1.00
7.50 6.60 6.30 9.70 6.30 9.90 1.00
8.00 7.10 6.70 9.80 6.70 10.00 1.00
8.40 7.50 7.10 10.00 7.10 10.30 1.00
9.00 8.10 7.70 10.60 7.70 10.90 1.50
9.50 8.60 8.20 11.00 8.20 11.40 1.50
10.00 9.10 8.60 11.60 8.60 12.00 2.00
12.00 11.00 10.60 13.50 10.60 14.00 2.00

Primary inspection methods

* Preferred sizes

1) If a Back-up Ring is used, the recommended radius should always be r = 0.25 ± 0.2 mm (0.010 ±

0.008 inch).

2) The given values for the housing depth are based on the nominal O-Ring cross section dimensions.

The O-Ring inside diameter and its stretch are not considered. The given installation dimensions

cannot be used for FFKM materials

Primary inspection methods

  • ISO 3601 (Parts 1, 2 & 3):
    Primary international standard for O-ring dimensions, tolerances, and visual quality acceptance.

  • AS568:
    Widely recognized U.S. dimensional and tolerance standard.

  • ASTM D1414:
    Comprehensive ASTM standard specifying dimensional and physical property testing of O-rings.

  • ASTM D395 (Compression Set):
    Determines the material's ability to maintain elasticity and sealing integrity after prolonged deformation.

  • ASTM D2240 (Durometer Hardness):
    Standard test method for measuring elastomer hardness.

  • ISO 815 (Compression Set Testing):
    International equivalent to ASTM D395.

  • ASTM D412 & ISO 37 (Tensile/Elongation Tests):
    Measure tensile strength, modulus, and elongation properties.

  • ASTM D471 & ISO 1817 (Fluid Immersion):
    Evaluate chemical and fluid compatibility.

  • NORSOK M710 & ISO 23936-2 (Oil & Gas Testing):
    Standards specific to harsh oil and gas environments, particularly explosive decompression and fluid compatibility testing.

  • ISIR (Initial Sample Inspection Report):
    A process for verifying first-sample conformance during manufacturing, ensuring initial quality compliance before mass production.