Gear box cover stud nut and washer [not included] (set of 7), ZP Suits Norton dolls head, upright and laydown gearboxes 1934 to 1956. Dolls head requires 7; upright requires 2, laydown requires 3. Norton used a spring washer under the nut, one of the few places they had spring washers, but it does chew up the aluminium. Original part numbers: 3596; A2/307 - Gearbox cover stud nut 9663; A2/308 - Gearbox cover stud nut spring washer
