Buna 70-426-Black-Pk5

APG stocks the SB-H70426-5, an AS568-426 black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 4.6 in (116.84 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 5.15 in (130.81 mm). An o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load. The catalog record notes: 5.125IDX4.625"ODX.25"CS.

Buna-N (Nitrile) is specified here for reliable performance in both static and dynamic service, low compression set under sustained load. The compound resists greases and lubricants, water, and many alcohols. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where ketones or automotive brake fluid are present.

It sees regular use in agricultural equipment, general industrial maintenance, and fluid power.

Reference part number SB-H70426-5 when ordering; the item is sold by the bag. Review your operating media and conditions against this specification before installation.