-256 BLACK BUNA 90D O-RING

H90256 is an AS568-256 black Buna-N (Nitrile) 90 Shore A O-Ring with an inside diameter of 5.734 in (145.64 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 6.012 in (152.7 mm). In service, this o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

Buna-N (Nitrile) is known for strong abrasion and tear resistance, an economical choice for high-volume maintenance programs. This material stands up to petroleum-based oils, water, and propane and butane. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C).

It sees regular use in general industrial maintenance, hydraulic and pneumatic systems, and fluid power.

Reference part number H90256 when ordering; the item is sold individually. Unit weight is approximately 5.86 g. Check the compound against your process media, pressure and temperature before committing to a design. For a size or compound outside the standard catalog, APG can quote from a print or sample.