AS568-015 B70 (NBR) O-Ring Mil-Spec 70 Duro Low Temp Nitrile (-65 to +240°F)


Qty Discounts Prices
  • Model: B70015-MSLT
    Dimensions: 9/16"ID X 11/16"OD X 1/16"CS
    Actual: 0.551"ID X 0.070"CS
    Metric: 14mm ID X 1.78mm CS
  • 18 in Stock
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9/16"ID X 11/16"OD X 1/16"CS

Buna-N O-Rings 70 Duro (NBR): MIL-P-25732

The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or NBR, is a copolymer of Butadiene and Acrylonitirle. O-Rings used in low temperatures may become hardand brittle, making them more susceptible to cracking. These seals can be used in staticsealing applications with continuous servicetemperatures as low as -65°F. 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.Commonly used in hydraulic/pneumatic motors, cylinders, pumps and valves.

Buna-N / Nitrile Recommended uses:

  • Gasoline, Military Aircraft Hydraulic Fluid
  • Petroleum oils and fluids.
  • Gasoline
  • Hydraulic fluids
  • L.P. gases
  • Cold Water.
  • Silicone greases and oils
  • Di-ester base lubricants (MIL-L-7808).
  • Ethylene glycol base fluids (Hydrolubes)

Nitrile is not recommended for:

  • Automatic Transmission Fluid
  • Halogenated hydrocarbons (carbon tetrachloride, trichloroethylene)
  • Nitro hydrocarbons (nitrobenzene, aniline)
  • Hot Air
  • Phosphate ester hydraulic fluids (Skydrol, Fyrquel, Pydraul).
  • Ketones (MEK, acetone)
  • Ozone
  • Sunlight, UV
  • Weather
  • Strong Acids Ozone
  • Automotive brake fluid

Compound Info:

  • Low-Temp MilSpec Nitrile MS28775. AS28775, MIL P 25732
  • Color: Black
  • Duro: 70
  • FDA: No
  • ASTM D2000 M2BG710 B14 EO14 EO34 Z1 Z2 Z3 Z4 Z5.

Operating temperature: -65° to +240°F

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