Q-327 BUNA 70 Q RING

The QH70327 is an AS568-327 black Buna-N (Nitrile) 70 Shore A Quad-Ring with an inside diameter of 1.725 in (43.82 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 2.145 in (54.48 mm). This quad-ring delivers lower friction and better sealing stability than a comparable round-section o-ring.

It resists water, hydraulic fluids, and many alcohols. That behavior comes from the compound itself: Buna-N (Nitrile) is valued for reliable performance in both static and dynamic service, an economical choice for high-volume maintenance programs. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It is not the right choice where strong acids or automotive brake fluid are present. The profile itself contributes two sealing bands per contact face rather than one and lower compressive load required to achieve a seal.

Typical settings include automotive, general industrial maintenance, and hydraulic and pneumatic systems.

Reference part number QH70327 when ordering; the item is sold individually. Unit weight is approximately 4.53 g and nominal inside diameter is listed as 1 3/4 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application.