Buna 70-158-Black-Pk25

Ordered as SB-H70158-25, this is an AS568-158 black Buna-N (Nitrile) 70 Shore A O-Ring supplied 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). The o-ring compresses into its gland to block fluid or gas migration across a joint. Supplementary detail from the product record: 4.9375IDX4.75"ODX.0938"CS.

Buna-N (Nitrile) offers reliable performance in both static and dynamic service, low compression set under sustained load. This material stands up to water, greases and lubricants, and propane and butane. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Applications involving polar solvents or automotive brake fluid call for a different compound.

Common environments for this compound include automotive, hydraulic and pneumatic systems, and general industrial maintenance.

Order part number SB-H70158-25, sold by the bag. 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.