5MM CS X 38MM ID BLACK BUNA 70D

Part number H5X38 is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 38 mm (1.496 in), a cross section of 5 mm (0.197 in), and an outside diameter of 48 mm (1.89 in). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

This material stands up to hydraulic fluids, petroleum-based oils, and many alcohols. That behavior comes from the compound itself: Buna-N (Nitrile) delivers reliable performance in both static and dynamic service, low compression set under sustained load. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Applications involving automotive brake fluid or polar solvents call for a different compound.

You will find this material specified across construction equipment, fluid power, and general industrial maintenance.

Reference part number H5X38 when ordering; the item is sold individually. Unit weight is approximately 3.239 g. Check the compound against your process media, pressure and temperature before committing to a design.