-205 BLACK BUNA 90D O-RING

H90205 is an AS568-205 black Buna-N (Nitrile) 90 Shore A O-Ring built to an inside diameter of 0.421 in (10.69 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 0.699 in (17.75 mm). In service, this o-ring compresses into its gland to block fluid or gas migration across a joint.

Buna-N (Nitrile) is specified here for most widely specified general-purpose sealing elastomer, reliable performance in both static and dynamic service. The material holds up against petroleum-based oils, hydraulic fluids, and propane and butane. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. It is not the right choice where ketones or polar solvents are present.

Maintenance and OEM teams specify it across automotive, construction equipment, and agricultural equipment.

H90205 ships individually. Unit weight is approximately 0.5909 g and nominal inside diameter is listed as 7/16 inch. Check the compound against your process media, pressure and temperature before committing to a design.