*4250-366Y MINNESOTA RUBBER QUAD RING

HQ4250 is an AS568-250 black Buna-N (Nitrile) 70 Shore A Quad-Ring with an inside diameter of 4.984 in (126.59 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 5.262 in (133.65 mm). In service, this quad-ring uses a four-lobed profile to create two sealing surfaces per side, reducing the squeeze needed to seal.

Buna-N (Nitrile) is specified here for economical choice for high-volume maintenance programs, strong abrasion and tear resistance. The compound resists many alcohols, hydraulic fluids, and propane and butane. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where polar solvents or strong acids are present. The profile itself contributes lower compressive load required to achieve a seal and two sealing bands per contact face rather than one.

Typical settings include fluid power, automotive, and general industrial maintenance.

Stocked as HQ4250 and sold individually. Nominal inside diameter is listed as 5 inch. Review your operating media and conditions against this specification before installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.