Buna 70-355-Black-Pk5

Ordered as SB-H70355-5, this is an AS568-355 black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 5.225 in (132.72 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 5.645 in (143.38 mm). The o-ring creates a positive seal at flange, piston and rod interfaces without added hardware. This item is further identified as 0.210CSX5.225"IDX5.645"OD.

Buna-N (Nitrile) is specified here for economical choice for high-volume maintenance programs and most widely specified general-purpose sealing elastomer. It resists greases and lubricants, propane and butane, and petroleum-based oils. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C).

Common environments for this compound include construction equipment, fluid power, and hydraulic and pneumatic systems.

Stocked as SB-H70355-5 and sold by the bag. 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.