3MM CS X 49.5MM ID BLACK BUNA 70D

H3X49.5 is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 49.5 mm (1.949 in), a cross section of 3 mm (0.118 in), and an outside diameter of 55.5 mm (2.19 in). In service, this o-ring delivers dependable bidirectional sealing in a compact groove envelope.

Expect good resistance to petroleum-based oils, water, and hydraulic fluids. Buna-N (Nitrile) offers strong abrasion and tear resistance, low compression set under sustained load. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Applications involving ozone and direct sunlight or strong acids call for a different compound.

Maintenance and OEM teams specify it across automotive, agricultural equipment, and general industrial maintenance.

Order part number H3X49.5, sold individually. Unit weight is approximately 0.0015 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.