New! Triumph Primary Chain Adjuster Sleeve Nut. Rebuilding that barn find engine that has been sitting for many, many, years? Chances are this sleeve nut is rusted! Start fresh with this English made factory spec sleeve adjusting nut! Comes with the correct end slot for using the factory tool! Fits a wide variety of Triumph 350, 500, 650, & 750 Unit models (Bonneville, T120, Tiger, TR6, TR7, Trophy, TR6C, Daytona, T100R, etc) up to 1982. Please refer to your parts catalog for proper fitment.Made in the UKO.E.M Part number is 70-9703, E9703, E4153 or 70-4153