3.53MM CS X 47.63MM ID BLACK BUNA 70D

Ordered as H3.53X47.63, this is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 47.63 mm (1.875 in), a cross section of 3.53 mm (0.139 in), and an outside diameter of 54.69 mm (2.15 in). The o-ring delivers dependable bidirectional sealing in a compact groove envelope.

Expect good resistance to hydraulic fluids, petroleum-based oils, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) is specified for low compression set under sustained load and an economical choice for high-volume maintenance programs. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Exposure to strong acids or automotive brake fluid will shorten service life.

It sees regular use in agricultural equipment, hydraulic and pneumatic systems, and general industrial maintenance.

This item is sold individually under part number H3.53X47.63. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.