7MM CS X 285.1MM ID BLACK BUNA 70D

H7X285.1 is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 285.1 mm (11.224 in), a cross section of 7 mm (0.276 in), and an outside diameter of 299.1 mm (11.78 in). In service, this o-ring delivers dependable bidirectional sealing in a compact groove envelope.

The compound resists petroleum-based oils, many alcohols, and hydraulic fluids. That behavior comes from the compound itself: Buna-N (Nitrile) delivers low compression set under sustained load, reliable performance in both static and dynamic service. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Applications involving ketones or ozone and direct sunlight call for a different compound.

It sees regular use in automotive, hydraulic and pneumatic systems, and general industrial maintenance.

Order part number H7X285.1, sold individually. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.