90021-ZZ5-M01 Flange (6X14) Bolt - Overview. The 90021-ZZ5-M01 Flange (6X14) Bolt is a critical component in Honda marine engine systems. Specifically engineered for secure mounting and alignment in marine applications, this flange bolt ensures the structural integrity of various engine assemblies. Precision manufactured with exact OEM specifications and tolerances, it guarantees seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OEM