4332-366Y MINNESOTA RUBBER QUAD RING

Ordered as HQ4332, this is an AS568-332 black Buna-N (Nitrile) 70 Shore A Quad-Ring built to an inside diameter of 2.35 in (59.69 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 2.77 in (70.36 mm). The quad-ring delivers lower friction and better sealing stability than a comparable round-section o-ring.

Expect good resistance to petroleum-based oils, hydraulic fluids, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) is widely chosen for strong abrasion and tear resistance, an economical choice for high-volume maintenance programs. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Applications involving automotive brake fluid or ketones call for a different compound. The profile itself contributes a parting line located away from the sealing surface and resistance to the spiral twisting that defeats round-section rings.

You will find this material specified across agricultural equipment, construction equipment, and general industrial maintenance.

HQ4332 ships individually. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. For a size or compound outside the standard catalog, APG can quote from a print or sample.