Yamaha Bolt, Hex Socket Button - 90111-08037-00. Durable and Reliable Hex Socket Button Bolt for Yamaha Engines. The Yamaha Bolt, Hex Socket Button - 90111-08037-00 is a high-quality, robust fastening solution designed for securing various components in Yamaha engines. This durable bolt is engineered for optimal performance and fit, ensuring your engine components stay securely fastened. With its corrosion-resistant construction and precision design, this hex socket button bolt is perfect for a