90704-PT0-000 Key (4.5X38.5) - Overview. The 90704-PT0-000 Key (4.5X38.5) is a critical OEM component used in various Honda marine engine systems and automotive applications. This precision-engineered key functions within the crankshaft system, locking the crank pulley securely to the crankshaft, preventing slippage and ensuring consistent mechanical performance. Designed to Honda's factory specifications, it integrates seamlessly with existing equipment, preserving the system's reliability and operational integrity.. Key Features. Precisely sized 4.5mm x 38.5mm key for reliable shaft connection.. OEM genuine Honda part ensuring perfect fit and durability.. Contributes to secure mechanical motion by preventing pulley slippage.. Manufactured to match factory dimensions and tolerances exactly.. Clean integration with associated hardware and engine assemblies.. Supports optimal system performance and long-term durability.. Why Choose Genuine OEM. Using original Honda parts like the 90704-