Q-202 BUNA 70 Q RING

Ordered as QH70202, this is an AS568-202 black Buna-N (Nitrile) 70 Shore A Quad-Ring supplied with an inside diameter of 0.234 in (5.94 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 0.512 in (13 mm). The quad-ring provides a dual sealing band on each contact face for improved reliability.

It resists water, hydraulic fluids, and propane and butane. Buna-N (Nitrile) delivers low compression set under sustained load, reliable performance in both static and dynamic service. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. It is not the right choice where strong acids or ozone and direct sunlight are present. The profile itself contributes a parting line located away from the sealing surface and lower compressive load required to achieve a seal.

Maintenance and OEM teams specify it across agricultural equipment, hydraulic and pneumatic systems, and construction equipment.

Reference part number QH70202 when ordering; the item is sold individually. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.