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With a 75 Shore A durometer rating, it strikes the ideal balance between flexibility and compression set resistance — maintaining a reliable seal under sustained pressure and temperature cycling.\u003c\/p\u003e\u003ch3\u003eKey Performance Characteristics\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Fluorocarbon (FKM\/Viton®-equivalent)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurometer:\u003c\/strong\u003e 75 Shore A ±5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -20°F to +400°F (-29°C to +204°C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure Rating:\u003c\/strong\u003e Suitable for high-pressure hydraulic systems; use back-up rings above 1,500 PSI per AS568 groove recommendations\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChemical Resistance:\u003c\/strong\u003e Excellent resistance to petroleum-based hydraulic fluids, mineral oils, fuel, and many synthetic fluids; resistant to ozone, weathering, and oxidation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAS568 Compatible:\u003c\/strong\u003e Dimensioned to AS568 standard dash sizes for drop-in groove compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTypical Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eHydraulic cylinders and actuators\u003c\/li\u003e\n\u003cli\u003eHigh-temperature fluid systems\u003c\/li\u003e\n\u003cli\u003eFuel and oil handling equipment\u003c\/li\u003e\n\u003cli\u003eAerospace and industrial hydraulic circuits\u003c\/li\u003e\n\u003cli\u003eStatic and dynamic sealing in aggressive chemical environments\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cem\u003eNote: Not recommended for use with ketones (MEK, acetone), esters, or certain phosphate ester hydraulic fluids. 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