Triumph / BSA Clutch Locking Service Tool - 61-3768 - T100 / A50 / A65 / T120 / T140 54033234 then this is Exactly the

then this is Exactly the part you need

518" with a 19 thread pitch (straight threads)

Made in Taiwan

99-3754 or 99-7036

Andover Norton has stated that the C3 Crankshaft bearing is best for all Commandos

Triumph / BSA Clutch Locking Service Tool - 61-3768 - T100 / A50 / A65 / T120 / T140 54033234 then this is Exactly theTriumph Twins Clutch Locking Service Tool. With this tool there is no need to modify old clutch plates and spending hours making your own! Makes getting your clutch hub nut off easy! It's affordable, ships free, and saves you time! Made of steel and comes with a bright plated finish! Fits Triumph Twins (Unit & Pre Unit) 350, 500, 650 & 750 models (3TA, 5TA, T120, Bonneville, T140, T110, 6T, etc) from 1945 1983. Also fits BSA 500 & 650 Twins