This o-ring is supplied in black Buna-N (Nitrile) 70 Shore A measuring an inside diameter of 35.5 mm (1.398 in), a cross section of 3.55 mm (0.14 in), and an outside diameter of 42.6 mm (1.68 in), catalogued under part number H3.55X35.5. It seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.
Buna-N (Nitrile) is specified here for strong abrasion and tear resistance, most widely specified general-purpose sealing elastomer. The compound resists propane and butane, water, and many alcohols. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It should not be specified for service in ketones or polar solvents.
Common environments for this compound include fluid power, general industrial maintenance, and hydraulic and pneumatic systems.
This item is sold individually under part number H3.55X35.5. Unit weight is approximately 1.4794 g. Review your operating media and conditions against this specification before installation. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.
Description 3.55MM CS X 35.5MM ID BLACK BUNA 70D
Actual Outside Diameter 42.6 mm (1.68 inch)
Actual Cross Section 3.55 mm (0.14 inch)
Actual Inside Diameter 35.5 mm (1.398 inch)
Measurement System Metric
Product Category O-Rings - Metric - Commodity