Buna 70-031-Black-Pk25

Part number SB-H70031-25 is an AS568-031 black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 1.739 in (44.17 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 1.879 in (47.73 mm). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware. Additional detail on this item: 0.070CSX1.739"IDX1.879"OD.

This material stands up to greases and lubricants, many alcohols, and petroleum-based oils. Buna-N (Nitrile) is valued for an economical choice for high-volume maintenance programs, reliable performance in both static and dynamic service. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Exposure to polar solvents or ketones will shorten service life.

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

Reference part number SB-H70031-25 when ordering; the item is sold by the bag. Review your operating media and conditions against this specification before installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.