Q-237 BUNA 70 Q RING

Part number QH70237 is an AS568-237 black Buna-N (Nitrile) 70 Shore A Quad-Ring measuring an inside diameter of 3.359 in (85.32 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 3.637 in (92.38 mm). A quad-ring provides a dual sealing band on each contact face for improved reliability.

This material stands up to water, greases and lubricants, and petroleum-based oils. That behavior comes from the compound itself: Buna-N (Nitrile) is known for the most widely specified general-purpose sealing elastomer and low compression set under sustained load. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). The profile itself contributes resistance to the spiral twisting that defeats round-section rings and two sealing bands per contact face rather than one.

Typical settings include fluid power, general industrial maintenance, and construction equipment.

Stocked as QH70237 and sold individually. Unit weight is approximately 3.1508 g and nominal inside diameter is listed as 3 3/8 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation.