Buna 70-039-Black-Pk10

Part number SB-H70039-10 is an AS568-039 black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 2.739 in (69.57 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 2.879 in (73.13 mm). An o-ring remains the most cost-effective sealing element available for pressurized assemblies. Source specification: 0.070CSX2.739"IDX2.879"OD.

Buna-N (Nitrile) offers the most widely specified general-purpose sealing elastomer, strong abrasion and tear resistance. The compound resists 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. Applications involving automotive brake fluid or ketones call for a different compound.

You will find this material specified across automotive, hydraulic and pneumatic systems, and agricultural equipment.

This item is sold by the bag under part number SB-H70039-10. Nominal inside diameter is listed as 2 3/4 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.