Buna 70-242-Black-Pk50

Part number SB-H70242-50 is an AS568-242 black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 3.984 in (101.19 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 4.262 in (108.25 mm). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware. Additional detail on this item: 4.25IDX4"ODX.125"CS.

Buna-N (Nitrile) is specified here for reliable performance in both static and dynamic service, most widely specified general-purpose sealing elastomer. The material holds up against propane and butane, hydraulic fluids, and petroleum-based oils. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Applications involving ozone and direct sunlight or polar solvents call for a different compound.

You will find this material specified across construction equipment, automotive, and agricultural equipment.

Order part number SB-H70242-50, sold by the bag. Check the compound against your process media, pressure and temperature before committing to a design. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.