5MM CS X 143MM ID BLACK BUNA 70D

H5X143 is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 143 mm (5.63 in), a cross section of 5 mm (0.197 in), and an outside diameter of 153 mm (6.02 in). In service, this o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

As a material, Buna-N (Nitrile) offers an economical choice for high-volume maintenance programs, strong abrasion and tear resistance. Expect good resistance to greases and lubricants, propane and butane, and water. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in automotive brake fluid or strong acids.

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

H5X143 ships individually. Unit weight is approximately 11.697 g. 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.