4MM CS X 11MM ID BLACK BUNA 70D

This o-ring is supplied in black Buna-N (Nitrile) 70 Shore A measuring an inside diameter of 11 mm (0.433 in), a cross section of 4 mm (0.157 in), and an outside diameter of 19 mm (0.75 in), catalogued under part number H4X11. It seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

The compound resists hydraulic fluids, many alcohols, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) is valued for low compression set under sustained load, strong abrasion and tear resistance. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Exposure to strong acids or ketones will shorten service life.

You will find this material specified across agricultural equipment, automotive, and hydraulic and pneumatic systems.

H4X11 ships individually. Unit weight is approximately 0.728 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.