Triumph BSA Clutch Securing Main Shaft Nut 57-1047 68-3300 9/16" X 20 A65 T120 60-4100 *Please note that this headlight

*Please note that this headlight bucket is not correct for 1968 & Earlier BSA Twins as they did not come with a pressure warning switch

Is your primary chain stretched or worn

Etc) from approx 1964-1974

06-2059 or 56606

**Features** 19-7115

Triumph BSA Clutch Securing Main Shaft Nut 57-1047 68-3300 9/16" X 20 A65 T120 60-4100 *Please note that this headlight*Now In Stock!* New English Made Triumph & BSA Twins CEI Clutch Securing Mainshaft Sleeved Nut. For a long time this part was considered "Hard To Find"! Not anymore! Made to complete O. E. M. Specs in England! Just install and off you go! Nut measures 9 16" with a thread pitch of 20 TPI (CEI). Fits many Triumph Unit & Pre Unit Twins 350, 500 & 650 (Bonneville, T120, Tiger, T110, T100, 3TA, Tiger, Etc) from 1953 1967. Also fits many BSA A50 & A65 Unit