Ordered as H90M3X39.2, this is a black Buna-N (Nitrile) 90 Shore A O-Ring supplied with an inside diameter of 39.2 mm (1.543 in), a cross section of 3 mm (0.118 in), and an outside diameter of 45.2 mm (1.78 in). The o-ring delivers dependable bidirectional sealing in a compact groove envelope.
As a material, Buna-N (Nitrile) is known for strong abrasion and tear resistance, low compression set under sustained load. This material stands up to petroleum-based oils, greases and lubricants, and propane and butane. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in polar solvents or strong acids.
Common environments for this compound include fluid power, automotive, and general industrial maintenance.
Stocked as H90M3X39.2 and sold individually. Review your operating media and conditions against this specification before installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.
Description 3MM CS X 39.2MM ID BLACK BUNA 90D
Actual Outside Diameter 45.2 mm (1.78 inch)
Actual Cross Section 3 mm (0.118 inch)
Actual Inside Diameter 39.2 mm (1.543 inch)
Measurement System Metric
Product Category O-Rings - Metric - Commodity