Q-348 BUNA 70 Q RING

This quad-ring is supplied in AS568-348 black Buna-N (Nitrile) 70 Shore A quad profile supplied with an inside diameter of 4.35 in (110.49 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 4.77 in (121.16 mm), catalogued under part number QH70348. It seats in a standard o-ring gland while offering improved dynamic performance.

The material holds up against water, greases and lubricants, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) is specified for low compression set under sustained load, strong abrasion and tear resistance. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. It should not be specified for service in ozone and direct sunlight or ketones.

Typical settings include general industrial maintenance, fluid power, and agricultural equipment.

This item is sold individually under part number QH70348. Unit weight is approximately 10.044 g and nominal inside diameter is listed as 4 3/8 inch. 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.