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-013 B70 Buna-N O-Ring Teflon Coated


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Min:  962
  • Model: TCB70013
  • 0 in Stock
  • 7/16"ID X 9/16"OD X 1/16"CS
  • Actual: 0.426"ID X 0.070"CS
  • Metric: 10.82mm ID X 1.78mm CS

O-ring Size: 3/8"ID X 1/2"OD X 1/16"CS  ** 3-4 Weeks to Ship **

The coatings we sell are the highest quality. Our Teflon™ and color pigments are sized less than 5 mircrons to allow use where other systems cause problems with pumps and filters. The coating is applied in thickness of .0002 to .0006 inches. While many elastomer compounds experience very minimal shrinkage and durometer change during the coating cure process, this is not a problem for most applications. The coating is not designed to provide any chemical advantage not supplied by the base compound nor will it protect the rings themselves from chemical attack. The color imparted on the o-ring is not considered permanent, although it will out last the life of the o-ring in many applications.

Nitrile, Buna-N O-Rings (NBR):

Nitrile, also known as Buna-N or NBR, is a copolymer of Butadiene and Acrylonitirle. It is the most commonly used elastomer for sealing products. It has a temperature range of -40F to +250F and is exceptionally resistant to petroleum base oils and hydrocarbon fuels. Nitrile materials also exhibit excellent tensile strength and abrasion resistance properties. The material performs well with most dilute acids, silicone oils and lubricants and in water applications. It is not recommended for use with ketones, aromatic hydrocarbons and phosphate ester hydraulic fluids. More than 50% of the Orings sold are Nitrile Orings, commonly used in hydraulic/pneumatic motors, cylinders, pumps and valves.

Buna-N / Nitrile Recommended uses:

  • General purpose sealing.
  • Petroleum oils and fluids.
  • Hydraulic fluids
  • Cold Water.
  • Silicone greases and oils
  • Di-ester base lubricants (MIL-L-7808).
  • Ethylene glycol base fluids (Hydrolubes)

Nitrile is not recommended for:

  • Halogenated hydrocarbons (carbon tetrachloride, trichloroethylene)
  • Nitro hydrocarbons (nitrobenzene, aniline)
  • Phosphate ester hydraulic fluids (Skydrol, Fyrquel, Pydraul).
  • Ketones (MEK, acetone)
  • Strong Acids Ozone
  • Automotive brake fluid.

Operating temperature: -40° to +250F°

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