4131-366Y MINNESOTA RUBBER QUAD RING

Part number HQ4131 is an AS568-131 black Buna-N (Nitrile) 70 Shore A quad profile Quad-Ring supplied with an inside diameter of 1.674 in (42.52 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 1.88 in (47.75 mm). A quad-ring provides a dual sealing band on each contact face for improved reliability.

The material holds up against hydraulic fluids, petroleum-based oils, and many alcohols. That behavior comes from the compound itself: Buna-N (Nitrile) offers low compression set under sustained load and an economical choice for high-volume maintenance programs. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Exposure to ozone and direct sunlight or polar solvents will shorten service life.

Typical settings include general industrial maintenance, hydraulic and pneumatic systems, and fluid power.

Stocked as HQ4131 and sold individually. Nominal inside diameter is listed as 1.6875 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.