Q-225 BUNA 70 Q RING

APG stocks the QH70225, an AS568-225 black Buna-N (Nitrile) 70 Shore A Quad-Ring supplied with an inside diameter of 1.859 in (47.22 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 2.137 in (54.28 mm). A quad-ring delivers lower friction and better sealing stability than a comparable round-section o-ring.

Buna-N (Nitrile) is specified here for low compression set under sustained load and economical choice for high-volume maintenance programs. The material holds up against hydraulic fluids, greases and lubricants, and many alcohols. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Exposure to strong acids or automotive brake fluid will shorten service life. The profile itself contributes two sealing bands per contact face rather than one and a parting line located away from the sealing surface.

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

Order part number QH70225, sold individually. Unit weight is approximately 1.8769 g and nominal inside diameter is listed as 1 7/8 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation.