8.4MM CS X 239.5MM ID BLACK BUNA 70D

Part number H8.4X239.5 is a black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 239.5 mm (9.429 in), a cross section of 8.4 mm (0.331 in), and an outside diameter of 256.3 mm (10.09 in). An o-ring delivers dependable bidirectional sealing in a compact groove envelope. This item is further identified as Metric O-RING, JIS P240.

Buna-N (Nitrile) is specified here for low compression set under sustained load, strong abrasion and tear resistance. It resists hydraulic fluids, many alcohols, and water. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C).

Maintenance and OEM teams specify it across general industrial maintenance, fluid power, and construction equipment.

H8.4X239.5 ships individually. Unit weight is approximately 53.568 g. Application requirements vary, so validate compatibility with your process conditions prior to installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.