*4321-366Y MINNESOTA RUBBER QUAD RING

Part number HQ4321 is an AS568-321 black Buna-N (Nitrile) 70 Shore A Quad-Ring supplied with an inside diameter of 1.162 in (29.51 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 1.582 in (40.18 mm). A quad-ring provides a dual sealing band on each contact face for improved reliability.

Expect good resistance to hydraulic fluids, propane and butane, and greases and lubricants. Buna-N (Nitrile) offers reliable performance in both static and dynamic service, strong abrasion and tear resistance. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with ketones or polar solvents. The profile itself contributes lower compressive load required to achieve a seal and two sealing bands per contact face rather than one.

Typical settings include general industrial maintenance, automotive, and construction equipment.

HQ4321 ships individually. Nominal inside diameter is listed as 1 3/16 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.