-158 BLACK BUNA 50D O-RING

This o-ring is supplied in AS568-158 black Buna-N (Nitrile) 50 Shore A with an inside diameter of 4.737 in (120.32 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 4.943 in (125.55 mm), catalogued under part number H50158. It remains the most cost-effective sealing element available for pressurized assemblies.

This material stands up to petroleum-based oils, propane and butane, and many alcohols. Buna-N (Nitrile) is valued 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).

Maintenance and OEM teams specify it across construction equipment, hydraulic and pneumatic systems, and agricultural equipment.

Order part number H50158, sold individually. Nominal inside diameter is listed as 4 3/4 inch. Check the compound against your process media, pressure and temperature before committing to a design. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.