Buna 70-241-Black-Pk50

Part number SB-H70241-50 is an AS568-241 black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 3.859 in (98.02 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 4.137 in (105.08 mm). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware. The catalog record notes: 4.125IDX3.875"ODX.125"CS.

As a material, Buna-N (Nitrile) delivers strong abrasion and tear resistance, reliable performance in both static and dynamic service. This material stands up to water, propane and butane, and petroleum-based oils. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Applications involving polar solvents or ketones call for a different compound.

It sees regular use in automotive, construction equipment, and fluid power.

SB-H70241-50 ships by the bag. Nominal inside diameter is listed as 3 7/8 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application.