*4364-366Y MINNESOTA RUBBER QUAD RING

APG stocks the HQ4364, an AS568-364 black Buna-N (Nitrile) 70 Shore A Quad-Ring measuring an inside diameter of 6.725 in (170.82 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 7.145 in (181.48 mm). A quad-ring delivers lower friction and better sealing stability than a comparable round-section o-ring.

It resists propane and butane, greases and lubricants, and many alcohols. Buna-N (Nitrile) is valued for an economical choice for high-volume maintenance programs and the most widely specified general-purpose sealing elastomer. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Applications involving automotive brake fluid or polar solvents call for a different compound. The profile itself contributes two sealing bands per contact face rather than one and resistance to the spiral twisting that defeats round-section rings.

You will find this material specified across fluid power, construction equipment, and hydraulic and pneumatic systems.

Reference part number HQ4364 when ordering; the item is sold individually. Check the compound against your process media, pressure and temperature before committing to a design. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.