Buna 70-238-Black-Pk50

This o-ring is supplied in AS568-238 black Buna-N (Nitrile) 70 Shore A with an inside diameter of 3.484 in (88.49 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 3.762 in (95.55 mm), catalogued under part number SB-H70238-50. It seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces. Additional detail on this item: 3.75IDX3.5"ODX.125"CS.

As a material, Buna-N (Nitrile) delivers low compression set under sustained load, strong abrasion and tear resistance. Expect good resistance to water, many alcohols, and petroleum-based oils. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C).

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

Reference part number SB-H70238-50 when ordering; the item is sold by the bag. Nominal inside diameter is listed as 3 1/2 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application.