Buna 70-430-Black-Pk5

APG stocks the SB-H70430-5, an AS568-430 black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 5.1 in (129.54 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 5.65 in (143.51 mm). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware. Additional detail on this item: 5.625IDX5.125"ODX.25"CS.

As a material, Buna-N (Nitrile) is specified for strong abrasion and tear resistance, low compression set under sustained load. The compound resists hydraulic fluids, many alcohols, and water. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in ketones or strong acids.

You will find this material specified across hydraulic and pneumatic systems, agricultural equipment, and automotive.

Order part number SB-H70430-5, sold by the bag. Nominal inside diameter is listed as 5 1/8 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. 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.