-442 BLACK BUNA 50D O-RING

H50442 is an AS568-442 black Buna-N (Nitrile) 50 Shore A O-Ring measuring an inside diameter of 7.225 in (183.52 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 7.775 in (197.49 mm). In service, this o-ring remains the most cost-effective sealing element available for pressurized assemblies.

This material stands up to hydraulic fluids, petroleum-based oils, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) is known for the most widely specified general-purpose sealing elastomer and low compression set under sustained load. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C).

Common environments for this compound include automotive, general industrial maintenance, and fluid power.

Reference part number H50442 when ordering; the item is sold individually. Check the compound against your process media, pressure and temperature before committing to a design. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.