Buna 70-230-Black-Pk100

APG stocks the SB-H70230-100, an AS568-230 black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 2.484 in (63.09 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 2.762 in (70.15 mm). An o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load. The catalog record notes: 2.75IDX2.5"ODX.125"CS.

Buna-N (Nitrile) is specified here for economical choice for high-volume maintenance programs and most widely specified general-purpose sealing elastomer. This material stands up to propane and butane, petroleum-based oils, and hydraulic fluids. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Exposure to automotive brake fluid or ozone and direct sunlight will shorten service life.

Maintenance and OEM teams specify it across agricultural equipment, general industrial maintenance, and automotive.

SB-H70230-100 ships by the bag. Nominal inside diameter is listed as 2 1/2 inch. 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.