90201-ZZ5-000 Special (24Mm) Nut - Overview. The 90201-ZZ5-000 Special (24Mm) Nut is a critical component designed for Honda marine engine systems. This specialized 24mm nut supports key connection points in Honda outboard engines and marine equipment. It plays an essential role in securing parts securely while ensuring operational reliability under marine conditions. Manufactured to meet precise factory specifications, this nut ensures seamless integration with existing parts, maintaining optim