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AS019-75F Fluorocarbon (Black) Oring (AS568-019 Size 0.070 CS x 0.801 ID)
Model: AS019-75F
Minimum order: 25
Stock: 26
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AS019-75F Fluorocarbon (Black) Oring (AS568-019 Size 0.070 CS  x 0.801 ID)
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AS019-75F Fluorocarbon Black O-Ring AS568-019

Fluorocarbon (also called FKM or Viton®) is very close to a universal elastomer for use in the o-ring sealing industry. This is due to its broad range of chemical resistances and very good range of operating temperatures combined with ozone, uv, weathering, and gasoline resistances. Additionally, benefits of fluorocarbon o-rings seals have been seen for use as vacuum seals due to its low gas impermeability rating. Fluorocarbon should be avoided in use with low temperature applications or when exposer to hot water, steam, polar solvents, low molecular weight esters and ethers, glycol based brake fluids, or hot hydrofluoric or chlorosulfonic acids are a factor.

The fluorocarbon black AS019-75F o-ring can be reference in one of four ways:

  • Mostly commonly, the industry standard AS568 “dash” number: (AS568-019)
  • Standard dimensions: (CS 0.070" x ID 0.801")
  • Metric dimensions: (CS 1.78 x ID 20.35)
  • Nominal fractional dimensions: (CS 1/16 " x ID 13/16")

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 fluorocarbon o-rings, the standard nominal durometer is 75.

Primary Uses:

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

  • automotive fuel handling
  • aircraft engine seals
  • high temperature applications requiring good compression set
  • general industrial o-ring seals
  • Model Number: AS019-75F
  • Manufacturers Part Number: AS019-75F
  • Industry Standard Reference Number: AS568-019
  • Material Type: Fluorocarbon / FKM / Viton®
  • Color: Black
  • Durometer (ShoreA): 75
  • Viton is a Registered Trade Mark of E. I. du Pont de Nemours and Company or Affiliates
Temperatures Range (Dry Heat)
Low: High:
5`F / -15`C 390`F / 199`C
Fluorocarbon Black O-Ring AS568-019 Application Ratings
Properties Excellent Good Fair Poor
Oils & Grease
fluorocarbon has excellent resistance verse oils and grease
Tear Strength  
fluorocarbon exhibits good tensile strength
Fuel Resistance  
fluorocarbon exhibits good fuel resistance
Heat Ozone & Aging Resistance
silicone orings are excellent verse heat, ozone and aging
Water Swell Resistance  
fluorocarbon exhibits good water swell resistance
Ammonia, Amines, Alkalis      
fluorocarbon o-rings should not be used with ammonia, amines or alkalis
Fluorocarbon Black O-Ring AS568-019 Dimensions CS x ID

AS568-019 (Durometer 75) cross reference sizes

  • Nominal Fraction: 1/16 x 13/16
  • Actual Size: 0.070 x 0.801
  • Metric Size Millimeters: 1.78 x 20.35
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Currently viewing: AS019-75F | AS568-019 FKM / Fluorocarbon Black O-ring 75 Durometer
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