1.78MM CS X 6.75MM ID BLACK BUNA 70D

H1.78X6.75 is a black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 6.75 mm (0.266 in), a cross section of 1.78 mm (0.07 in), and an outside diameter of 10.31 mm (0.41 in). In service, this o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

This material stands up to greases and lubricants, many alcohols, and petroleum-based oils. Buna-N (Nitrile) is known for the most widely specified general-purpose sealing elastomer and low compression set under sustained load. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C).

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

Reference part number H1.78X6.75 when ordering; the item is sold individually. As always, verify media compatibility and operating conditions against the requirements of your specific application. For a size or compound outside the standard catalog, APG can quote from a print or sample.