Buna 70-209-Black-Pk25

This o-ring is supplied in AS568-209 black Buna-N (Nitrile) 70 Shore A built to an inside diameter of 0.671 in (17.04 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 0.949 in (24.1 mm), catalogued under part number SB-H70209-25. It creates a positive seal at flange, piston and rod interfaces without added hardware. Supplementary detail from the product record: 0.139CSX0.671"IDX0.949"OD.

Expect good resistance to many alcohols, water, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) delivers an economical choice for high-volume maintenance programs, strong abrasion and tear resistance. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Verify compatibility before use with automotive brake fluid or ozone and direct sunlight.

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

Stocked as SB-H70209-25 and sold by the bag. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.