-442 BLACK BUNA 70D O-RING

APG stocks the H70442, an AS568-442 black Buna-N (Nitrile) 70 Shore A O-Ring with 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). An o-ring remains the most cost-effective sealing element available for pressurized assemblies.

The compound resists petroleum-based oils, hydraulic fluids, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) is known for low compression set under sustained load and an economical choice for high-volume maintenance programs. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where polar solvents or ketones are present.

Common environments for this compound include automotive, agricultural equipment, and construction equipment.

Stocked as H70442 and sold individually. Unit weight is approximately 28.272 g. Review your operating media and conditions against this specification before installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.