963243-1 is a single wire seal component for the AMP MCP 6.3/4.8K contact system, specifically engineered for use in automotive electrical interconnection applications. This seal is designed to accommodate wire insulation diameters of 1.4–2.1 mm and features a blue color for easy identification. The seal has an outer diameter (Diameter A) of 8.2 mm and is supplied in packages of 2,500 units. It is used to seal individual wire cavities in the AMP MCP 6.3/4.8K connector housing (cavity diameter 6.0 mm), providing environmental protection and preventing moisture and contaminant ingress. This component is essential for maintaining the high reliability and long-term durability required in automotive powertrain, safety, and body/chassis systems.