Triumph Pre-Unit Twins Gear Box Sprocket Nut (1) 57-0440 70-4587 We stock front and rear

We stock front and rear fenders for BSA models (A50 / A65) from 1966-1970

Fits Norton 750 and 850 Commandos from 1971-1974 only

etc) from 1967-1974

*****Always check your parts book to ensure the best fitment*****

Triumph Pre-Unit Twins Gear Box Sprocket Nut (1) 57-0440 70-4587 We stock front and rearReplace your old and damaged gear box sprocket nut with this quality English made part. This part replaces Triumph part number 57 0440, T0440 and T440. Manufactured from high tensile steel unlike others on the market. This nut threads on to your high gear to secure your transmission sprocket. Fits Triumph 650 pre unit twins (Bonneville, T120R, Tiger, TR6, T110, 6T, etc) from approx 1938 1962. Also fits Triumph 500 pre unit twins up to approx 1956.