Q-243 BUNA 70 Q RING

This quad-ring is supplied in AS568-243 black Buna-N (Nitrile) 70 Shore A supplied with an inside diameter of 4.109 in (104.37 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 4.387 in (111.43 mm), catalogued under part number QH70243. It seats in a standard o-ring gland while offering improved dynamic performance.

Expect good resistance to propane and butane, water, and hydraulic fluids. That behavior comes from the compound itself: Buna-N (Nitrile) is widely chosen for strong abrasion and tear resistance, an economical choice for high-volume maintenance programs. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in ozone and direct sunlight or polar solvents. The profile itself contributes a parting line located away from the sealing surface and resistance to the spiral twisting that defeats round-section rings.

It sees regular use in construction equipment, agricultural equipment, and general industrial maintenance.

Reference part number QH70243 when ordering; the item is sold individually. Unit weight is approximately 4.28 g. Check the compound against your process media, pressure and temperature before committing to a design.