The W6P-P004 is a protective dust cap and lanyard assembly for DEUTSCH HD10 series connectors, providing environmental sealing to protect the connector interface when the connector is not mated. This assembly combines a gray dust cap with a nitrile or steel lanyard material, available in multiple cavity configurations (3, 6, or 9 cavities) for both plug and receptacle connector types. The lanyard is constructed with either nitrile o-ring with 3M heat shrink and thermoplastic adhesive or steel with specified breaking strength, offering secure tethering to prevent loss of the protective cap. These dust cap and lanyard assemblies are commonly used in industrial and commercial transportation applications to maintain connector cleanliness and integrity during storage and field service operations.