-393 BLACK BUNA 90D O-RING

APG stocks the H90393, an AS568-393 black Buna-N (Nitrile) 90 Shore A O-Ring built to an inside diameter of 23.94 in (608.08 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 24.36 in (618.74 mm). An o-ring compresses into its gland to block fluid or gas migration across a joint.

As a material, Buna-N (Nitrile) is valued for an economical choice for high-volume maintenance programs, strong abrasion and tear resistance. Expect good resistance to petroleum-based oils, hydraulic fluids, and propane and butane. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Applications involving ketones or polar solvents call for a different compound.

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

Reference part number H90393 when ordering; the item is sold individually. Unit weight is approximately 55.36 g and nominal inside diameter is listed as 24 inch. Check the compound against your process media, pressure and temperature before committing to a design. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.