4MM CS X 247MM ID BLACK BUNA 70D

Part number H4X247 is a black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 247 mm (9.724 in), a cross section of 4 mm (0.157 in), and an outside diameter of 255 mm (10.04 in). An o-ring compresses into its gland to block fluid or gas migration across a joint.

It resists water, many alcohols, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) is widely chosen for low compression set under sustained load, strong abrasion and tear resistance. 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 ozone and direct sunlight or strong acids.

It sees regular use in agricultural equipment, construction equipment, and hydraulic and pneumatic systems.

This item is sold individually under part number H4X247. Unit weight is approximately 12.102 g. Check the compound against your process media, pressure and temperature before committing to a design. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.