Q-131 BUNA 70 Q RING

This quad-ring is supplied in AS568-131 black Buna-N (Nitrile) 70 Shore A quad profile measuring an inside diameter of 1.674 in (42.52 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 1.88 in (47.75 mm), catalogued under part number QH70131. It delivers lower friction and better sealing stability than a comparable round-section o-ring.

Expect good resistance to many alcohols, water, 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, reliable performance in both static and dynamic service. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Verify compatibility before use with ketones or automotive brake fluid.

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

QH70131 ships individually. Unit weight is approximately 0.8908 g and nominal inside diameter is listed as 1 11/16 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.