Q-247 BUNA 70 Q RING

Part number QH70247 is an AS568-247 black Buna-N (Nitrile) 70 Shore A Quad-Ring supplied with an inside diameter of 4.609 in (117.07 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 4.887 in (124.13 mm). A quad-ring provides a dual sealing band on each contact face for improved reliability.

Buna-N (Nitrile) offers the most widely specified general-purpose sealing elastomer, reliable performance in both static and dynamic service. Expect good resistance to greases and lubricants, petroleum-based oils, and hydraulic fluids. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Applications involving strong acids or ketones call for a different compound. The profile itself contributes two sealing bands per contact face rather than one and lower compressive load required to achieve a seal.

It sees regular use in automotive, fluid power, and agricultural equipment.

Reference part number QH70247 when ordering; the item is sold individually. Unit weight is approximately 4.4222 g and nominal inside diameter is listed as 4 5/8 inch. Check the compound against your process media, pressure and temperature before committing to a design. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.