AS568-903 B70 (NBR) Buna-N FDA/NSF61 70 Duro O-Ring (SAE-3)



Qty Discounts Prices
100-2,999
$0.040		 3,000-20,799
$0.018		 20,800-110,999
$0.012		 111,000+
$0.009

$0.040

  • Model: B70903-NSF
    Dimensions: Tube Size: 3/16"
    Actual: 0.301"ID X 0.064"CS
    Metric: 7.65mm ID X 1.63mm CS
  • 18799 in Stock
Add to Cart:
Min Qty:  100

Tube Size OD: 3/16", SAE Dash Size -3, Thread Size 3/8-24 UNF

NSF - FDA Compliant Buna-N O-Rings 70 Duro (NBR):

The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or NBR, is a copolymer of Butadiene and Acrylonitirle. 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.
  • 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:

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

Compound Info:

  • A general purpose, sulfur-cured Nitrile (Buna-N) compound
  • Color: Black
  • Duro: 70
  • NSF/FDA: Yes
  • Meets ASTM Standards
  • B70-NSF is designed to FDA and NSF Compliance

Operating temperature: -40° to +212°F