Buna 70-207-Black-Pk25

The SB-H70207-25 is an AS568-207 black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 0.546 in (13.87 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 0.824 in (20.93 mm). This o-ring compresses into its gland to block fluid or gas migration across a joint. The catalog record notes: 0.139CSX0.546"IDX0.824"OD.

This material stands up to hydraulic fluids, propane and butane, and water. That behavior comes from the compound itself: Buna-N (Nitrile) is specified for the most widely specified general-purpose sealing elastomer and low compression set under sustained load. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in ketones or automotive brake fluid.

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

Stocked as SB-H70207-25 and sold by the bag. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.