-273 BLACK BUNA 50D O-RING

Part number H50273 is an AS568-273 black Buna-N (Nitrile) 50 Shore A O-Ring built to an inside diameter of 9.734 in (247.24 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 10.012 in (254.3 mm). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

Buna-N (Nitrile) is specified here for economical choice for high-volume maintenance programs and low compression set under sustained load. The material holds up against petroleum-based oils, greases and lubricants, and propane and butane. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where automotive brake fluid or ketones are present.

Maintenance and OEM teams specify it across construction equipment, hydraulic and pneumatic systems, and automotive.

Stocked as H50273 and sold individually. Nominal inside diameter is listed as 9 3/4 inch. Check the compound against your process media, pressure and temperature before committing to a design.