Yamaha Screw, Countersunk - 90151-06025-00. OEM-Precision Fastening for Flush-Mount Applications. The Yamaha Screw, countersunk - 90151-06025-00 is a genuine Yamaha replacement part designed for seamless integration in flush-mount fastening jobs. Manufactured to Yamaha's exact specifications, this fastener delivers secure, vibration-resistant performance-ideal for parts requiring a smooth, flush surface.. Whether you're conducting professional repairs or routine DIY maintenance, this countersunk