*Q-025 BUNA 70 Q RING

APG stocks the QH70025, an AS568-025 black Buna-N (Nitrile) 70 Shore A Quad-Ring with an inside diameter of 1.176 in (29.87 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 1.316 in (33.43 mm). A quad-ring uses a four-lobed profile to create two sealing surfaces per side, reducing the squeeze needed to seal.

Expect good resistance to greases and lubricants, petroleum-based oils, and propane and butane. Buna-N (Nitrile) is valued for the most widely specified general-purpose sealing elastomer and an economical choice for high-volume maintenance programs. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Applications involving ketones or automotive brake fluid call for a different compound. The profile itself contributes two sealing bands per contact face rather than one and lower compressive load required to achieve a seal.

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

Reference part number QH70025 when ordering; the item is sold individually. Unit weight is approximately 0.3047 g and nominal inside diameter is listed as 1 3/16 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.