8.4MM CS X 189.5MM ID BLACK BUNA 70D

Part number H8.4X189.5 is a black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 189.5 mm (7.461 in), a cross section of 8.4 mm (0.331 in), and an outside diameter of 206.3 mm (8.12 in). An o-ring delivers dependable bidirectional sealing in a compact groove envelope. This item is further identified as Metric O-RING, JIS P190.

Buna-N (Nitrile) is specified for low compression set under sustained load and an economical choice for high-volume maintenance programs. It resists water, hydraulic fluids, and propane and butane. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Exposure to strong acids or ketones will shorten service life.

You will find this material specified across fluid power, construction equipment, and general industrial maintenance.

Stocked as H8.4X189.5 and sold individually. Unit weight is approximately 42.25 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.