-445 BLACK BUNA 90D O-RING

The H90445 is an AS568-445 black Buna-N (Nitrile) 90 Shore A O-Ring supplied with an inside diameter of 7.975 in (202.57 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 8.525 in (216.54 mm). This o-ring delivers dependable bidirectional sealing in a compact groove envelope.

The material holds up against propane and butane, petroleum-based oils, and hydraulic fluids. That behavior comes from the compound itself: Buna-N (Nitrile) is known for the most widely specified general-purpose sealing elastomer, reliable performance in both static and dynamic service. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Applications involving ozone and direct sunlight or strong acids call for a different compound.

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

This item is sold individually under part number H90445. Unit weight is approximately 33.11 g and nominal inside diameter is listed as 8 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.