Every component on your outboard has a job to do, and even the smallest fasteners play a crucial role in keeping everything secure. The Yamaha Screw with Washer (90159-05059-00) is designed for a firm, vibration-resistant hold, ensuring critical parts stay locked in place no matter the conditions. Whether securing engine components, mounting brackets, or other structural elements, a reliable fastener prevents unnecessary movement and long-term wear.. Built for Strength & Stability:. OEM-Specific Fit - Crafted to Yamaha's precise specifications for a perfect, hassle-free installation.. Integrated Washer Design - Distributes pressure evenly to prevent overtightening or damage to surrounding parts.. Corrosion-Resistant Build - Withstands saltwater, temperature extremes, and constant engine vibrations.. A loose or worn screw might seem minor, but over time, it can lead to misalignment, component stress, and even performance issues. Whether you're swapping out old hardware or replacing a mi