-426 BLACK BUNA 50D O-RING

Ordered as H50426, this is an AS568-426 black Buna-N (Nitrile) 50 Shore A O-Ring with an inside diameter of 4.6 in (116.84 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 5.15 in (130.81 mm). The o-ring remains the most cost-effective sealing element available for pressurized assemblies.

It resists water, propane and butane, and hydraulic fluids. That behavior comes from the compound itself: Buna-N (Nitrile) is widely chosen for strong abrasion and tear resistance, low compression set under sustained load. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with polar solvents or automotive brake fluid.

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

This item is sold individually under part number H50426. Nominal inside diameter is listed as 4 5/8 inch. Check the compound against your process media, pressure and temperature before committing to a design. For a size or compound outside the standard catalog, APG can quote from a print or sample.