Bolt for gearbox cam plate spindle, suit Norton laydown and AMC gearbox (set2). Suit Nortons post 1949. [Does not suit upright gearboxes]. To use on AMC gearbox do not use the spring washer Original Part Numbers: D12/348; 040136 - cam plate bolt (laydown box 1949-56) A2/347 - spring washer A2/346; 000174 - flat washer