568-044 BUNA 70 SQUARE CUT RINGS

APG stocks the SH70044, an AS568-044 black Buna-N (Nitrile) 70 Shore A Square-Cut Ring with an inside diameter of 3.739 in (94.97 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 3.879 in (98.53 mm). A square-cut ring provides an economical lathe-cut alternative where a moulded o-ring is not required.

Buna-N (Nitrile) is specified here for most widely specified general-purpose sealing elastomer and low compression set under sustained load. The compound resists greases and lubricants, petroleum-based oils, and hydraulic fluids. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where strong acids or polar solvents are present. The profile itself contributes simple lathe-cut manufacture at low tooling cost and a rectangular section that will not roll in the groove. Note that a square section is less suited to high-speed rotary service, where the larger contact area raises friction and heat.

You will find this material specified across automotive, general industrial maintenance, and hydraulic and pneumatic systems.

SH70044 ships individually. Unit weight is approximately 0.957 g and nominal inside diameter is listed as 3 3/4 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. For a size or compound outside the standard catalog, APG can quote from a print or sample.