-018 BLACK BUNA 90D O-RING

APG stocks the H90018, an AS568-018 black Buna-N (Nitrile) 90 Shore A O-Ring with an inside diameter of 0.739 in (18.77 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 0.879 in (22.33 mm). An o-ring remains the most cost-effective sealing element available for pressurized assemblies.

Buna-N (Nitrile) is specified here for low compression set under sustained load, strong abrasion and tear resistance. It resists water, propane and butane, and greases and lubricants. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It is not the right choice where ozone and direct sunlight or polar solvents are present.

Common environments for this compound include agricultural equipment, hydraulic and pneumatic systems, and fluid power.

Order part number H90018, sold individually. Unit weight is approximately 0.216 g and nominal inside diameter is listed as 3/4 inch. Check the compound against your process media, pressure and temperature before committing to a design. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.