Q-333 BUNA 70 Q RING

Part number QH70333 is an AS568-333 black Buna-N (Nitrile) 70 Shore A quad profile Quad-Ring with an inside diameter of 2.475 in (62.87 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 2.895 in (73.53 mm). A quad-ring delivers lower friction and better sealing stability than a comparable round-section o-ring.

This material stands up to propane and butane, many alcohols, and water. That behavior comes from the compound itself: Buna-N (Nitrile) is specified for low compression set under sustained load, reliable performance in both static and dynamic service. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in ketones or polar solvents.

You will find this material specified across fluid power, agricultural equipment, and construction equipment.

Stocked as QH70333 and sold individually. Unit weight is approximately 6.341 g. Check the compound against your process media, pressure and temperature before committing to a design.