90011-ZY6-030 Flange (6X52) Bolt - Overview. The 90011-ZY6-030 Flange (6X52) Bolt is a crucial component in Honda marine engine systems. Specifically designed as a flanged bolt measuring 6mm in diameter and 52mm in length, it supports the secure mechanical fastening needs within the marine engine assembly. By ensuring the integrity of the mounting points and other structural connections, this bolt helps maintain reliable engine operation. Manufactured to precise factory specifications, it ensure