3MM CS X 12.5MM ID BLACK BUNA 70D

H3X12.5 is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 12.5 mm (0.492 in), a cross section of 3 mm (0.118 in), and an outside diameter of 18.5 mm (0.73 in). In service, this o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

This material stands up to hydraulic fluids, many alcohols, and propane and butane. Buna-N (Nitrile) is valued for reliable performance in both static and dynamic service, strong abrasion and tear resistance. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Exposure to ozone and direct sunlight or automotive brake fluid will shorten service life.

Maintenance and OEM teams specify it across fluid power, agricultural equipment, and construction equipment.

This item is sold individually under part number H3X12.5. Unit weight is approximately 0.428 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.