4338-366Y MINNESOTA RUBBER QUAD RING

APG stocks the HQ4338, an AS568-338 black Buna-N (Nitrile) 70 Shore A quad profile Quad-Ring supplied with an inside diameter of 3.1 in (78.74 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 3.52 in (89.41 mm). A quad-ring seats in a standard o-ring gland while offering improved dynamic performance.

Expect good resistance to propane and butane, water, and many alcohols. Buna-N (Nitrile) is valued for reliable performance in both static and dynamic service, the most widely specified general-purpose sealing elastomer. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with strong acids or ozone and direct sunlight.

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

Reference part number HQ4338 when ordering; the item is sold individually. Nominal inside diameter is listed as 3 1/8. As always, verify media compatibility and operating conditions against the requirements of your specific application. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.