90102-ZW1-000 Bolt (1/4-28UNF) - Overview. The 90102-ZW1-000 Bolt (1/4-28UNF) is a finely engineered fastener designed specifically for Honda marine engine systems. This bolt plays a crucial role in securely assembling various components within the marine engine and boat systems, thereby maintaining the structural integrity and reliable operation of your equipment. With precise factory specifications and tolerance adherence, it ensures seamless integration with existing parts, maintaining optima