-405 BLACK BUNA 50D O-RING

APG stocks the H50405, an AS568-405 black Buna-N (Nitrile) 50 Shore A O-Ring supplied with an inside diameter of 1.975 in (50.17 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 2.525 in (64.14 mm). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

Buna-N (Nitrile) is widely chosen for strong abrasion and tear resistance, low compression set under sustained load. The compound resists petroleum-based oils, propane and butane, and hydraulic fluids. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Exposure to ozone and direct sunlight or ketones will shorten service life.

You will find this material specified across hydraulic and pneumatic systems, general industrial maintenance, and construction equipment.

H50405 ships individually. Nominal inside diameter is listed as 2 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. For a size or compound outside the standard catalog, APG can quote from a print or sample.