4MM CS X 438MM ID BLACK BUNA 70D

Ordered as H4X438, this is a black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 438 mm (17.244 in), a cross section of 4 mm (0.157 in), and an outside diameter of 446 mm (17.56 in). The o-ring compresses into its gland to block fluid or gas migration across a joint.

Buna-N (Nitrile) is specified here for most widely specified general-purpose sealing elastomer, reliable performance in both static and dynamic service. Expect good resistance to hydraulic fluids, greases and lubricants, and petroleum-based oils. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C).

You will find this material specified across general industrial maintenance, agricultural equipment, and hydraulic and pneumatic systems.

Reference part number H4X438 when ordering; the item is sold individually. Application requirements vary, so validate compatibility with your process conditions prior to installation.