Q-160 BUNA 70 Q RING

This quad-ring is supplied in AS568-160 black Buna-N (Nitrile) 70 Shore A supplied with an inside diameter of 5.237 in (133.02 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 5.443 in (138.25 mm), catalogued under part number QH70160. It seats in a standard o-ring gland while offering improved dynamic performance.

Expect good resistance to propane and butane, many alcohols, and petroleum-based oils. That behavior comes from the compound itself: Buna-N (Nitrile) is widely chosen for the most widely specified general-purpose sealing elastomer and low compression set under sustained load. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where strong acids or ozone and direct sunlight are present. The profile itself contributes two sealing bands per contact face rather than one and a parting line located away from the sealing surface.

Common environments for this compound include construction equipment, automotive, and general industrial maintenance.

Reference part number QH70160 when ordering; the item is sold individually. Unit weight is approximately 3.1 g and nominal inside diameter is listed as 5 1/4 inch. Review your operating media and conditions against this specification before installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.