-442 BLACK BUNA 90D O-RING

Part number H90442 is an AS568-442 black Buna-N (Nitrile) 90 Shore A O-Ring supplied with an inside diameter of 7.225 in (183.52 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 7.775 in (197.49 mm). An o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

Buna-N (Nitrile) is specified here for low compression set under sustained load and most widely specified general-purpose sealing elastomer. It resists hydraulic fluids, water, and propane and butane. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with ozone and direct sunlight or ketones.

You will find this material specified across hydraulic and pneumatic systems, agricultural equipment, and automotive.

Reference part number H90442 when ordering; the item is sold individually. Unit weight is approximately 29.502 g and nominal inside diameter is listed as 7 1/4 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application.