The QH70336 is an AS568-336 black Buna-N (Nitrile) 70 Shore A Quad-Ring with an inside diameter of 2.85 in (72.39 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 3.27 in (83.06 mm). This quad-ring resists spiral failure in reciprocating service thanks to its multi-lobe geometry.
Buna-N (Nitrile) offers reliable performance in both static and dynamic service, low compression set under sustained load. The compound resists propane and butane, hydraulic fluids, and petroleum-based oils. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. The profile itself contributes resistance to the spiral twisting that defeats round-section rings and a parting line located away from the sealing surface.
Maintenance and OEM teams specify it across fluid power, automotive, and hydraulic and pneumatic systems.
Order part number QH70336, sold individually. Unit weight is approximately 7.19 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.
Description Q-336 BUNA 70 Q RING
Actual Cross Section 0.21 inch (5.33 mm)
Actual Inside Diameter 2.85 inch (72.39 mm)
Actual Outside Diameter 3.27 inch (83.06 mm)
Measurement System Imperial
Product Category O-Rings - Square/Quad - Commodity