Buna 70-346-Black-Pk25

Ordered as SB-H70346-25, this is an AS568-346 black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 4.1 in (104.14 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 4.52 in (114.81 mm). The o-ring remains the most cost-effective sealing element available for pressurized assemblies. This item is further identified as 4.5IDX4.125"ODX.1875"CS.

Buna-N (Nitrile) is specified here for reliable performance in both static and dynamic service, most widely specified general-purpose sealing elastomer. The compound resists propane and butane, water, and many alcohols. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It is not the right choice where ozone and direct sunlight or automotive brake fluid are present.

You will find this material specified across construction equipment, general industrial maintenance, and automotive.

This item is sold by the bag under part number SB-H70346-25. Nominal inside diameter is listed as 4 1/8 inch. Review your operating media and conditions against this specification before installation. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.