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AS003-90N Nitrile Oring (AS568-003 Size 0.060 CS x 0.056 ID)
Model: AS003-90N
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AS003-90N Nitrile Oring (AS568-003 Size 0.060 CS  x 0.056 ID)
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AS003-90N Nitrile O-Ring AS568-003

Nitrile is the most widely used elastomer in the seal and o-ring industry. Its popularity results from the ability to sustain performance across a wide temperature range (-22F to 212F), and its excellent resistance to petroleum-based products. Additionally, nitrile material exhibits superior compression set, tear and abrasion resistance. Limiting properties of nitrile include poor ozone and weather resistance, with only a moderate resistance to high heat. However, in many applications these are not restricting factors. Nitrile is often referred to as Buna (Buna-N) and NBR.

The nitrile AS003-90N o-ring can be reference in one of four ways:

  • Mostly commonly, the industry standard AS568 “dash” number: (AS568-003)
  • Standard dimensions: (CS 0.060" x ID 0.056")
  • Metric dimensions: (CS 1.52 x ID 1.42)
  • Nominal fractional dimensions: (CS 1/16 " x ID 1/16")

The final consideration for an o-ring after size and material type is the durometer. Durometer is an industry standard measurement for a material’s hardness. Most often for rubber seals, durometer is measured and listed in accordance with the “Shore A” scale. Typical durometers for standard rubber seals are 70, 75 and 90, depending on the material. A higher number indicates a harder material. Durometer is also generally stated and accepted with a “+/- 5” tolerance. For nitrile o-rings, standard nominal durometers are 70 and 90.

Primary Uses:

O-Rings, rubber seals and custom molded rubber components for:

  • Standard Oil resistant applications
  • Custom Low temperature applications
  • Specialized Fuel systems, automotive, marine, and aircraft
  • General Industrial Use
  • Model Number: AS003-90N
  • Manufacturers Part Number: AS003-90N
  • Industry Standard Reference Number: AS568-003
  • Material Type: Nitrile, Buna-N, NBR
  • Durometer (ShoreA): 90
Temperatures Range (Dry Heat)
Low: High:
-22`F / -30`C 212`F / 100`C
Nitrile O-Ring AS568-003 Application Ratings
Properties Excellent Good Fair Poor
Oils & Grease  
Tear Strength  
Fuel Resistance      
Gas Impermeability  
Abrasion Resistance  
Nitrile O-Ring AS568-003 Dimensions CS x ID

AS568-003 (Durometer 90) cross reference sizes

  • Nominal Fraction: 1/16 x 1/16
  • Actual Size: 0.060 x 0.056
  • Metric Size Millimeters: 1.52 x 1.42
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Currently viewing: AS003-90N | AS568-003 Nitrile O-ring 90 Durometer (Buna-n / NBR)
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