*4318-366Y MINNESOTA RUBBER QUAD RING

APG stocks the HQ4318, an AS568-318 black Buna-N (Nitrile) 70 Shore A quad profile Quad-Ring built to an inside diameter of 0.975 in (24.77 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 1.395 in (35.43 mm). A quad-ring provides a dual sealing band on each contact face for improved reliability.

The compound resists hydraulic fluids, many alcohols, and petroleum-based oils. That behavior comes from the compound itself: Buna-N (Nitrile) delivers an economical choice for high-volume maintenance programs and the most widely specified general-purpose sealing elastomer. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Exposure to ketones or automotive brake fluid will shorten service life.

Common environments for this compound include agricultural equipment, automotive, and hydraulic and pneumatic systems.

Reference part number HQ4318 when ordering; the item is sold individually. Check the compound against your process media, pressure and temperature before committing to a design. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.