Buna 70-253-Black-Pk10

SB-H70253-10 is an AS568-253 black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 5.359 in (136.12 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 5.637 in (143.18 mm). In service, this o-ring compresses into its gland to block fluid or gas migration across a joint. Additional detail on this item: 5.625IDX5.375"ODX.125"CS.

Buna-N (Nitrile) is specified here for most widely specified general-purpose sealing elastomer, strong abrasion and tear resistance. The material holds up against water, hydraulic fluids, and petroleum-based oils. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in ketones or ozone and direct sunlight.

You will find this material specified across hydraulic and pneumatic systems, agricultural equipment, and general industrial maintenance.

This item is sold by the bag under part number SB-H70253-10. Nominal inside diameter is listed as 5 3/8 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.