Q-169 BUNA 70 Q RING

This quad-ring is supplied in AS568-169 black Buna-N (Nitrile) 70 Shore A supplied with an inside diameter of 7.487 in (190.17 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 7.693 in (195.4 mm), catalogued under part number QH70169. It seats in a standard o-ring gland while offering improved dynamic performance.

The compound resists water, many alcohols, and propane and butane. 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. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Exposure to automotive brake fluid or ozone and direct sunlight will shorten service life. The profile itself contributes a parting line located away from the sealing surface and resistance to the spiral twisting that defeats round-section rings.

Maintenance and OEM teams specify it across agricultural equipment, automotive, and construction equipment.

Stocked as QH70169 and sold individually. Unit weight is approximately 3.9306 g. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.