Buna 70-425-Black-Pk5

Part number SB-H70425-5 is an AS568-425 black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 4.475 in (113.67 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 5.025 in (127.64 mm). An o-ring delivers dependable bidirectional sealing in a compact groove envelope. The catalog record notes: 5IDX4.5"ODX.25"CS.

Buna-N (Nitrile) is specified here for reliable performance in both static and dynamic service, most widely specified general-purpose sealing elastomer. Expect good resistance to hydraulic fluids, water, and propane and butane. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service.

It sees regular use in hydraulic and pneumatic systems, fluid power, and automotive.

Reference part number SB-H70425-5 when ordering; the item is sold by the bag. Nominal inside diameter is listed as 4 1/2 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. For a size or compound outside the standard catalog, APG can quote from a print or sample.