Standard O-Rings are available in 369 sizes as set up by the Aerospace Standard 568 published by the Society of Automotive Engineers. These sizes are designated by dash numbers shown on the 568 DASH Chart and are standardized by imperial dimensions. Standard O-Rings are specified by their inside diameter and cross section width. AS568 is the most commonly used standard in the U.S. for aerospace, automotive and general industrial applications. For more information, please see: Aerospace Standard 568 Dash Number, Comparison Properties Chart, PTFE Encapsulated O-rings, Material Shelf Life, and O-ring Groove Design Chart. EP is also known as: Eythylene Propylene, EPR, EPDM, EPT, E.

EP is an elastomer which is characterized by wide range of applications and good chemical resistance. Ethylene propylene compounds have good resistance to detergents, alkalis, mild acids, greases, silicone oils, and alcohols.

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Inside Diamter (mm)

Inside Diamter (in)

Cross Section Width (in)

Item #

Inside Diamter

Cross Section Width

Durometer

Size Reference - AS568

Inside Diameter Tolerance +/-

Cross Section Tolerance +/-

-001 EP-70 N/A 0.74 mm0.029 in N/A 0.040 in N/A 70 N/A -001 N/A 0.004 in0.10 mm N/A 0.003 in0.08 mm
-002 EP-70 N/A 1.07 mm0.042 in N/A 0.050 in N/A 70 N/A -002 N/A 0.004 in0.10 mm N/A 0.003 in0.08 mm
-003 EP-70 N/A 1.42 mm0.056 in N/A 0.060 in N/A 70 N/A -003 N/A 0.004 in0.10 mm N/A 0.003 in0.08 mm
-004 EP-70 N/A 1.78 mm0.070 in N/A 0.070 in N/A 70 N/A -004 N/A 0.005 in0.12 mm N/A 0.003 in0.08 mm
-005 EP-70 N/A 2.57 mm0.101 in N/A 0.070 in N/A 70 N/A -005 N/A 0.005 in0.12 mm N/A 0.003 in0.08 mm
-006 EP-70 N/A 2.90 mm0.114 in N/A 0.070 in N/A 70 N/A -006 N/A 0.005 in0.12 mm N/A 0.003 in0.08 mm
-007 EP-70 N/A 3.68 mm0.145 in N/A 0.070 in N/A 70 N/A -007 N/A 0.005 in0.12 mm N/A 0.003 in0.08 mm
-008 EP-70 N/A 4.47 mm0.176 in N/A 0.070 in N/A 70 N/A -008 N/A 0.005 in0.12 mm N/A 0.003 in0.08 mm
-009 EP-70 N/A 5.28 mm0.208 in N/A 0.070 in N/A 70 N/A -009 N/A 0.005 in0.12 mm N/A 0.003 in0.08 mm
-010 EP-70 N/A 6.07 mm0.239 in N/A 0.070 in N/A 70 N/A -010 N/A 0.005 in0.12 mm N/A 0.003 in0.08 mm
-011 EP-70 N/A 7.65 mm0.300 in N/A 0.070 in N/A 70 N/A -011 N/A 0.005 in0.12 mm N/A 0.003 in0.08 mm
-012 EP-70 N/A 9.25 mm0.364 in N/A 0.070 in N/A 70 N/A -012 N/A 0.005 in0.12 mm N/A 0.003 in0.08 mm
-013 EP-70 N/A 10.82 mm0.426 in N/A 0.070 in N/A 70 N/A -013 N/A 0.005 in0.12 mm N/A 0.003 in0.08 mm
-014 EP-70 N/A 12.42 mm0.489 in N/A 0.070 in N/A 70 N/A -014 N/A 0.005 in0.12 mm N/A 0.003 in0.08 mm
-015 EP-70 N/A 14.00 mm0.551 in N/A 0.070 in N/A 70 N/A -015 N/A 0.007 in0.17 mm N/A 0.003 in0.08 mm
-016 EP-70 N/A 15.60 mm0.614 in N/A 0.070 in N/A 70 N/A -016 N/A 0.009 in0.22 mm N/A 0.003 in0.08 mm
-017 EP-70 N/A 17.17 mm0.676 in N/A 0.070 in N/A 70 N/A -017 N/A 0.009 in0.22 mm N/A 0.003 in0.08 mm
-018 EP-70 N/A 18.77 mm0.739 in N/A 0.070 in N/A 70 N/A -018 N/A 0.009 in0.22 mm N/A 0.003 in0.08 mm
-019 EP-70 N/A 20.35 mm0.801 in N/A 0.070 in N/A 70 N/A -019 N/A 0.009 in0.22 mm N/A 0.003 in0.08 mm
-020 EP-70 N/A 21.95 mm0.864 in N/A 0.070 in N/A 70 N/A -020 N/A 0.009 in0.22 mm N/A 0.003 in0.08 mm
-021 EP-70 N/A 23.52 mm0.926 in N/A 0.070 in N/A 70 N/A -021 N/A 0.009 in0.22 mm N/A 0.003 in0.08 mm
-022 EP-70 N/A 25.12 mm0.989 in N/A 0.070 in N/A 70 N/A -022 N/A 0.010 in0.25 mm N/A 0.003 in0.08 mm
-023 EP-70 N/A 26.70 mm1.051 in N/A 0.070 in N/A 70 N/A -023 N/A 0.010 in0.25 mm N/A 0.003 in0.08 mm
-024 EP-70 N/A 28.30 mm1.114 in N/A 0.070 in N/A 70 N/A -024 N/A 0.010 in0.25 mm N/A 0.003 in0.08 mm
-025 EP-70 N/A 29.87 mm1.176 in N/A 0.070 in N/A 70 N/A -025 N/A 0.011 in0.28 mm N/A 0.003 in0.08 mm
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