5.3MM CS X 48.7MM ID BLACK BUNA 70D

H5.3X48.7 is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 48.7 mm (1.917 in), a cross section of 5.3 mm (0.209 in), and an outside diameter of 59.3 mm (2.33 in). In service, this o-ring delivers dependable bidirectional sealing in a compact groove envelope.

This material stands up to water, propane and butane, and many alcohols. That behavior comes from the compound itself: Buna-N (Nitrile) is widely chosen for reliable performance in both static and dynamic service, the most widely specified general-purpose sealing elastomer. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. It should not be specified for service in ketones or polar solvents.

Maintenance and OEM teams specify it across fluid power, general industrial maintenance, and construction equipment.

Reference part number H5.3X48.7 when ordering; the item is sold individually. Unit weight is approximately 4.617 g. Review your operating media and conditions against this specification before installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.