*4354-366Y MINNESOTA RUBBER QUAD RING

HQ4354 is an AS568-354 black Buna-N (Nitrile) 70 Shore A Quad-Ring supplied with an inside diameter of 5.1 in (129.54 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 5.52 in (140.21 mm). In service, this quad-ring delivers lower friction and better sealing stability than a comparable round-section o-ring.

This material stands up to propane and butane, petroleum-based oils, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) delivers low compression set under sustained load and an economical choice for high-volume maintenance programs. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. The profile itself contributes lower compressive load required to achieve a seal and a parting line located away from the sealing surface.

You will find this material specified across automotive, hydraulic and pneumatic systems, and agricultural equipment.

HQ4354 ships individually. Check the compound against your process media, pressure and temperature before committing to a design. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.