4MM CS X 49MM ID BLACK BUNA 70D

Ordered as H4X49, this is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 49 mm (1.929 in), a cross section of 4 mm (0.157 in), and an outside diameter of 57 mm (2.24 in). The o-ring delivers dependable bidirectional sealing in a compact groove envelope.

This material stands up to petroleum-based oils, many alcohols, and hydraulic fluids. That behavior comes from the compound itself: Buna-N (Nitrile) is specified for strong abrasion and tear resistance, the most widely specified general-purpose sealing elastomer. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where polar solvents or ozone and direct sunlight are present.

Maintenance and OEM teams specify it across fluid power, hydraulic and pneumatic systems, and general industrial maintenance.

Stocked as H4X49 and sold individually. Unit weight is approximately 2.5973 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.