Q-008 BUNA 70 Q RING

APG stocks the QH70008, an AS568-008 black Buna-N (Nitrile) 70 Shore A Quad-Ring measuring an inside diameter of 0.176 in (4.47 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 0.316 in (8.03 mm). A quad-ring provides a dual sealing band on each contact face for improved reliability.

The material holds up against water, greases and lubricants, and hydraulic fluids. 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 a parting line located away from the sealing surface and two sealing bands per contact face rather than one.

You will find this material specified across fluid power, hydraulic and pneumatic systems, and automotive.

QH70008 ships individually. Unit weight is approximately 0.069 g. Application requirements vary, so validate compatibility with your process conditions prior to installation. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.