90003-Zw6-010 Flange (5X16) Bolt - Overview. The 90003-ZW6-010 Flange (5X16) Bolt is a critical fastening component designed specifically for Honda marine engine systems. This bolt provides secure and reliable mounting within the marine powertrain, ensuring that key components remain tightly fastened under operational stresses. Engineered to meet Honda factory specifications, it plays a vital role in maintaining the structural integrity and reliable function of your equipment. Its robust design