568-144 BUNA 70 SQUARE CUT RINGS

APG stocks the SH70144, an AS568-144 black Buna-N (Nitrile) 70 Shore A Square-Cut Ring supplied with an inside diameter of 2.487 in (63.17 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 2.693 in (68.4 mm). A square-cut ring seals with a broad flat contact band instead of the line contact of a round-section ring.

It resists water, propane and butane, and hydraulic fluids. That behavior comes from the compound itself: Buna-N (Nitrile) delivers reliable performance in both static and dynamic service, an economical choice for high-volume maintenance programs. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in ozone and direct sunlight or polar solvents. The profile itself contributes simple lathe-cut manufacture at low tooling cost and a flat contact band that spreads sealing load across a wider area. Note that a square section is less suited to high-speed rotary service, where the larger contact area raises friction and heat.

Typical settings include hydraulic and pneumatic systems, general industrial maintenance, and fluid power.

This item is sold individually under part number SH70144. Unit weight is approximately 1.364 g. Review your operating media and conditions against this specification before installation.