Q-315 BUNA 70 Q RING

Part number QH70315 is an AS568-315 black Buna-N (Nitrile) 70 Shore A Quad-Ring supplied with an inside diameter of 0.787 in (19.99 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 1.207 in (30.66 mm). A quad-ring delivers lower friction and better sealing stability than a comparable round-section o-ring.

As a material, Buna-N (Nitrile) delivers strong abrasion and tear resistance, low compression set under sustained load. The compound resists hydraulic fluids, greases and lubricants, and petroleum-based oils. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in automotive brake fluid or strong acids. The profile itself contributes resistance to the spiral twisting that defeats round-section rings and lower compressive load required to achieve a seal.

You will find this material specified across construction equipment, fluid power, and agricultural equipment.

Stocked as QH70315 and sold individually. Unit weight is approximately 2.1848 g. Review your operating media and conditions against this specification before installation.