Buna 70-252-Black-Pk10

The SB-H70252-10 is an AS568-252 black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 5.234 in (132.94 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 5.512 in (140 mm). This o-ring creates a positive seal at flange, piston and rod interfaces without added hardware. The catalog record notes: 5.5IDX5.25"ODX.125"CS.

Buna-N (Nitrile) is specified here for reliable performance in both static and dynamic service, economical choice for high-volume maintenance programs. Expect good resistance to water, hydraulic fluids, and petroleum-based oils. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service.

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

Stocked as SB-H70252-10 and 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.