Buna 70-266-Black-Pk5

The SB-H70266-5 is an AS568-266 black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 7.984 in (202.79 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 8.262 in (209.85 mm). This o-ring remains the most cost-effective sealing element available for pressurized assemblies. The catalog record notes: 0.139CSX7.984"IDX8.262"OD.

The material holds up against many alcohols, water, and petroleum-based oils. Buna-N (Nitrile) delivers reliable performance in both static and dynamic service, low compression set under sustained load. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Applications involving ketones or automotive brake fluid call for a different compound.

Typical settings include general industrial maintenance, fluid power, and hydraulic and pneumatic systems.

Reference part number SB-H70266-5 when ordering; the item is sold by the bag. Nominal inside diameter is listed as 8 inch. Review your operating media and conditions against this specification before installation.