*4023-366Y MINNESOTA RUBBER QUAD RING

The HQ4023 is an AS568-023 black Buna-N (Nitrile) 70 Shore A Quad-Ring with an inside diameter of 1.051 in (26.7 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 1.191 in (30.25 mm). This 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 petroleum-based oils. That behavior comes from the compound itself: Buna-N (Nitrile) is widely chosen for an economical choice for high-volume maintenance programs, strong abrasion and tear resistance. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where automotive brake fluid or polar solvents are present. The profile itself contributes lower compressive load required to achieve a seal and two sealing bands per contact face rather than one.

It sees regular use in hydraulic and pneumatic systems, fluid power, and construction equipment.

Stocked as HQ4023 and sold individually. Nominal inside diameter is listed as 1 1/16 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.