-425 BLACK BUNA 90D O-RING

APG stocks the H90425, an AS568-425 black Buna-N (Nitrile) 90 Shore A O-Ring built to an inside diameter of 4.475 in (113.67 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 5.025 in (127.64 mm). An o-ring compresses into its gland to block fluid or gas migration across a joint.

As a material, Buna-N (Nitrile) is widely chosen for an economical choice for high-volume maintenance programs and low compression set under sustained load. The material holds up against propane and butane, petroleum-based oils, and many alcohols. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Applications involving strong acids or ozone and direct sunlight call for a different compound.

Common environments for this compound include general industrial maintenance, construction equipment, and fluid power.

Stocked as H90425 and sold individually. Unit weight is approximately 18.64 g and nominal inside diameter is listed as 4 1/2 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.