-423 BLACK BUNA 90D O-RING

This o-ring is supplied in AS568-423 black Buna-N (Nitrile) 90 Shore A with an inside diameter of 4.225 in (107.32 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 4.775 in (121.29 mm), catalogued under part number H90423. It creates a positive seal at flange, piston and rod interfaces without added hardware.

Buna-N (Nitrile) is specified here for low compression set under sustained load, reliable performance in both static and dynamic service. The material holds up against water, greases and lubricants, and petroleum-based oils. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Applications involving strong acids or ozone and direct sunlight call for a different compound.

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

Reference part number H90423 when ordering; the item is sold individually. Unit weight is approximately 19.636 g. Review your operating media and conditions against this specification before installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.