A single loose fastener can turn a smooth Yamaha run into an all-day rattle. Drop in Yamaha's Bolt with Washer 90119-06027-00 and lock your hardware down the way the factory planned it. This short M6 stainless bolt with a captive flange washer is the go-to replacement for cowling brackets, anode plates, pump covers-anywhere vibration and salt team up to back ordinary screws out.. Why this OEM bolt earns a spot in your spares kit. One-piece washer head spreads clamping load so soft aluminum castings don't dimple or crack.. Precisely rolled M6-1.0 threads bite cleanly and resist galling, even after seasons of saltwater exposure.. Marine-grade stainless steel shrugs off corrosion; pulls free at next service instead of snapping flush.. Low-profile 10 mm hex clears tight cowling recesses and lets you torque it with a standard socket-no specialty bits required.. Swap it during routine maintenance or stash two in the helm box for dock-side fixes. Ten seconds with a 10 mm wrench restores facto