8.4MM CS X 224.5MM ID BLACK BUNA 70D

Part number H8.4X224.5 is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 224.5 mm (8.839 in), a cross section of 8.4 mm (0.331 in), and an outside diameter of 241.3 mm (9.5 in). An o-ring remains the most cost-effective sealing element available for pressurized assemblies. Supplementary detail from the product record: Metric O-RING, JIS P225.

The material holds up against greases and lubricants, water, and many alcohols. That behavior comes from the compound itself: Buna-N (Nitrile) is specified for low compression set under sustained load and the most widely specified general-purpose sealing elastomer. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It is not the right choice where polar solvents or automotive brake fluid are present.

Maintenance and OEM teams specify it across hydraulic and pneumatic systems, fluid power, and agricultural equipment.

Order part number H8.4X224.5, sold individually. Unit weight is approximately 49.275 g. Review your operating media and conditions against this specification before installation.