1.8MM CS X 6.3MM ID BLACK BUNA 70D

The H1.8X6.3 is a black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 6.3 mm (0.248 in), a cross section of 1.8 mm (0.071 in), and an outside diameter of 9.9 mm (0.39 in). This o-ring remains the most cost-effective sealing element available for pressurized assemblies.

The material holds up against hydraulic fluids, propane and butane, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) delivers an economical choice for high-volume maintenance programs, strong abrasion and tear resistance. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Applications involving polar solvents or automotive brake fluid call for a different compound.

Maintenance and OEM teams specify it across automotive, fluid power, and construction equipment.

Reference part number H1.8X6.3 when ordering; the item is sold individually. Unit weight is approximately 0.0799 g. Review your operating media and conditions against this specification before installation.