RC model aircraft parts Saito Engine SAi100135 Prop washer nut anti looseningThe RC model aircraft part is a prop washer nut specifically designed for Saito engines, with the model number SAi100135. This black nut is anti loosening and is compatible with Saito engines, suitable for gasoline and nitro & glow fuel types. Made in Japan, this high quality nut is designed for advanced RC model aircraft enthusiasts aged 17 years and up. Compatible Brand: For Saito Brand: Saito Type: SAI57T135A Color: Black Model: SAi100135