.125" (3.18mm) Fluorocarbon FKM/Viton 75 O-Ring Cord Stock, Bulk, Black


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O-Ring cord stock to make your own O-rings and gaskets

Please note: Priced & sold per foot. If ordering more than one foot (of the same size), the cord will come as one whole length.

Fluorocarbon FKM O-Ring Cord (Fluorocarbon, FKM)

Fluorocarbon rubber has excellent resistance to high temperatures, ozone, oxygen, mineral oil, synthetic hydraulic fluids, fuels, aromatics and many organic solvents and chemicals. Low temperature resistance is normally not favorable and for static applications is limited to approximately –15°F (–26°C) although in certain situations it is suitable down to –40°F (–40°C). Under dynamic conditions, the lowest service temperature is between 5°F and 0°F (–15°C and –18°C). Gas permeability is very low and similar to that of butyl rubber. Special fluorocarbon compounds exhibit an improved resistance to acids, fuels, water and steam.

Temperature Range:

  • Constant: -10°F to +400°F (-40°C to +121°C)
  • Intermittent: -20°F to +600°F (-28.9°C to +315.6°C)
  • Chemical Resistance:

    • Mineral oil and grease, low swelling in ASTM oil No. 1, and IRM 902 and IRM 903 oils
    • Non-flammable hydraulic fuels in the group HFD
    • Silicone oil and grease
    • Mineral and vegetable oil and grease
    • Aliphatic hydrocarbons (fuel, butane, propane, natural gas)
    • Aromatic hydrocarbons (benzene, toluene)
    • Chlorinated hydrocarbons (trichlorethylene and carbon tetrachloride)
    • Chlorine, Wet
    • Fuels, also fuels with methanol content
    • Diesel Fuel
    • Gasoline
    • High vacuum
    • Very good ozone, weather and aging resistance.

    Not Compatible With:

    • Glycol based brake fluids
    • Ammonia gas, amines, alkalis
    • Superheated steam
    • Acetone
    • Brake Fluid
    • Methyl Ethyl Ketone (MEK)
    • Low molecular organic acids (formic and acetic acids)


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