Nut and washer for many SSR SR70, SR70C, SR70 AUTO, SR110, SR110 SEMI, SR110DX, SR110TR, SR125, SR125 SEMI, SR125 Auto, SR125TR, SR125TR-BW, SR140TR, SR140TR-BW, SR160TR, SR160TX, SR170TR, SR170TX and Lazer 5 moped. May fit many other Chinese made Dirt bikes.