This o-ring is supplied in black Buna-N (Nitrile) 70 Shore A with an inside diameter of 78 mm (3.071 in), a cross section of 6 mm (0.236 in), and an outside diameter of 90 mm (3.54 in), catalogued under part number H6X78. It compresses into its gland to block fluid or gas migration across a joint.
As a material, Buna-N (Nitrile) is widely chosen for the most widely specified general-purpose sealing elastomer, strong abrasion and tear resistance. The material holds up against greases and lubricants, many alcohols, and propane and butane. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. It should not be specified for service in polar solvents or ketones.
You will find this material specified across automotive, hydraulic and pneumatic systems, and general industrial maintenance.
Reference part number H6X78 when ordering; the item is sold individually. Unit weight is approximately 9.1125 g. As always, verify media compatibility and operating conditions against the requirements of your specific application. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.
Description 6MM CS X 78MM ID BLACK BUNA 70D
Actual Outside Diameter 90 mm (3.54 inch)
Actual Cross Section 6 mm (0.236 inch)
Actual Inside Diameter 78 mm (3.071 inch)
Measurement System Metric
Product Category O-Rings - Metric - Commodity