-379 BLACK BUNA 90D O-RING

Ordered as H90379, this is an AS568-379 black Buna-N (Nitrile) 90 Shore A O-Ring supplied with an inside diameter of 10.975 in (278.77 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 11.395 in (289.43 mm). The o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

It resists petroleum-based oils, water, and many alcohols. That behavior comes from the compound itself: Buna-N (Nitrile) is valued for strong abrasion and tear resistance, low compression set under sustained load. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. It should not be specified for service in polar solvents or ketones.

Typical settings include construction equipment, general industrial maintenance, and hydraulic and pneumatic systems.

This item is sold individually under part number H90379. Unit weight is approximately 27.834 g and nominal inside diameter is listed as 11 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation.