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Parker O-Ring Compound Numbering Systems
N0750-80 Carboxylated (good wear -25 to 250 Black resistance) N1090-85 Carboxylated (good wear -25 to 225 Black resistance), Internally Lubed. HYDROGENATED NITRILE (HNBR, HSN) Hydrogenated nitrile was developed as an air-resistant variant of nitrile rubber. In HNBR, the carbon-carbon double bonds in the main polymer chain are
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