-131 BLACK BUNA 50D O-RING

APG stocks the H50131, an AS568-131 black Buna-N (Nitrile) 50 Shore A O-Ring with an inside diameter of 1.674 in (42.52 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 1.88 in (47.75 mm). An o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

This material stands up to hydraulic fluids, petroleum-based oils, and many alcohols. Buna-N (Nitrile) offers reliable performance in both static and dynamic service, an economical choice for high-volume maintenance programs. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It is not the right choice where ozone and direct sunlight or polar solvents are present.

Maintenance and OEM teams specify it across hydraulic and pneumatic systems, automotive, and fluid power.

H50131 ships individually. Nominal inside diameter is listed as 1 11/16 inch. Check the compound against your process media, pressure and temperature before committing to a design. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.