90307-ZV5-003 Nut (3/8-24UNF) - Overview. The 90307-ZV5-003 Nut (3/8-24UNF) is a crucial component in Honda marine engine rigging systems. This self-locking nut supports secure fastening in the rigging assembly, playing an essential role in maintaining the mechanical integrity and reliable operation of Honda marine engines. Manufactured to exact OEM standards, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Precision engineered