We hold large stocks of Buna-N Nitrile O Ring Gasket Cord from 1.00 mm – 25.00 mm in standard shore hardness with larger diameters available on request. In addition, Kaxite seals have an expanding stock range of both Silicone and EPDM cords. Our vast availability of cord stocks ensures that we can provide same day despatch and next day delivery at competitive prices.
All our cord can be supplied in bulk on spools or cut to length as required. Spool lengths vary by size, so please ask when ordering. But joined rings are also available upon request.
Nitrile, Buna-N O-Rings Cord (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 +250 F 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:
Ethylene glycol base fluids (Hydrolubes)
Di-ester base lubricants (MIL-L-7808)
Silicone greases and oils
General purpose sealing.
Petroleum oils and fluids.
Nitrile is not recommended for:
Halogenated hydrocarbons (carbon tetrachloride, trichloroethylene)
Phosphate ester hydraulic fluids (Skydrol, Fyrquel, Pydraul).
Nitro hydrocarbons (nitrobenzene, aniline)
Ketones (MEK, acetone)
Automotive brake fluid
Strong Acids Ozone