Ordered as H1X70, this is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 70 mm (2.756 in), a cross section of 1 mm (0.039 in), and an outside diameter of 72 mm (2.83 in). The o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.
As a material, Buna-N (Nitrile) offers strong abrasion and tear resistance, low compression set under sustained load. It resists hydraulic fluids, petroleum-based oils, and greases and lubricants. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It should not be specified for service in ozone and direct sunlight or automotive brake fluid.
You will find this material specified across fluid power, hydraulic and pneumatic systems, and general industrial maintenance.
Reference part number H1X70 when ordering; the item is sold individually. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. For a size or compound outside the standard catalog, APG can quote from a print or sample.
description 1MM CS X 70MM ID BLACK BUNA 70D
uf_description2 METRIC O-RING
Actual_OD 72 mm (2.83 inch)
Actual_CS 1 mm (0.039 inch)
Actual_ID 70 mm (2.756 inch)
ProductCode Description O-Rings - Metric - Commodity