Q-316 BUNA 70 Q RING

Ordered as QH70316, this is an AS568-316 black Buna-N (Nitrile) 70 Shore A Quad-Ring built to an inside diameter of 0.85 in (21.59 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 1.27 in (32.26 mm). The quad-ring provides a dual sealing band on each contact face for improved reliability.

The material holds up against hydraulic fluids, petroleum-based oils, and water. Buna-N (Nitrile) offers low compression set under sustained load and the most widely specified general-purpose sealing elastomer. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in ketones or strong acids. The profile itself contributes resistance to the spiral twisting that defeats round-section rings and two sealing bands per contact face rather than one.

It sees regular use in automotive, agricultural equipment, and general industrial maintenance.

Order part number QH70316, sold individually. Unit weight is approximately 2.42 g and nominal inside diameter is listed as 7/8 inch. Check the compound against your process media, pressure and temperature before committing to a design. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.