90203-ZW9-801 Nut, Lock (6mm) - Overview. The 90203-ZW9-801 Nut, Lock (6mm) is an essential component in Honda marine engine systems. This lock nut plays a vital role in securing critical parts within the locking system, ensuring stability and preventing loosening during operation. Designed to fit seamlessly with factory-installed components, it guarantees optimum performance and reliable marine engine functionality.. Key Features. 6mm lock nut specifically designed for Honda marine engine applications.. Genuine OEM part ensuring compatibility with Honda active marine engines.. Maintains secure fastening under vibration and mechanical stress to protect system integrity.. Constructed to meet strict factory specifications, dimensions, and tolerances.. Provides seamless integration with existing hardware, seals, and housings.. Helps maintain expected durability, performance, and overall operational feel.. Why Choose Genuine OEM. Using original Honda parts like the 90203-ZW9-801 Nut, Lock