APG stocks the H2X39.5, a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 39.5 mm (1.555 in), a cross section of 2 mm (0.079 in), and an outside diameter of 43.5 mm (1.71 in). An o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces. Source specification: Metric O-RING, JIS S40.
Buna-N (Nitrile) is specified here for low compression set under sustained load, strong abrasion and tear resistance. The material holds up against hydraulic fluids, propane and butane, and petroleum-based oils. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where ozone and direct sunlight or ketones are present.
Typical settings include fluid power, general industrial maintenance, and hydraulic and pneumatic systems.
Stocked as H2X39.5 and sold individually. Review your operating media and conditions against this specification before installation.
Description 2MM CS X 39.5MM ID BLACK BUNA 70D
Actual Outside Diameter 43.5 mm (1.71 inch)
Actual Cross Section 2 mm (0.079 inch)
Actual Inside Diameter 39.5 mm (1.555 inch)
Measurement System Metric
Product Category O-Rings - Metric - Commodity