Q-030 BUNA 70 Q RING

Ordered as QH70030, this is an AS568-030 black Buna-N (Nitrile) 70 Shore A Quad-Ring supplied with an inside diameter of 1.614 in (41 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 1.754 in (44.55 mm). The quad-ring uses a four-lobed profile to create two sealing surfaces per side, reducing the squeeze needed to seal.

Buna-N (Nitrile) is widely chosen for low compression set under sustained load, strong abrasion and tear resistance. Expect good resistance to greases and lubricants, many alcohols, and petroleum-based oils. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). The profile itself contributes a parting line located away from the sealing surface and two sealing bands per contact face rather than one.

Maintenance and OEM teams specify it across general industrial maintenance, fluid power, and agricultural equipment.

Reference part number QH70030 when ordering; the item is sold individually. Unit weight is approximately 0.4086 g and nominal inside diameter is listed as 1 5/8 inch. Review your operating media and conditions against this specification before installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.