Q-131 BUNA 70 Q RING

This quad-ring is supplied in AS568-131 black Buna-N (Nitrile) 70 Shore A 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. 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, 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.