Gearbox cover bottom stud + nut +washer, Norton upright

Gear box cover bottom stud and nut (ass). Suits Norton upright gearbox 1946 to 1948
Original Norton part numbers:
A2/306 - Gearbox cover (face plate) stud (bottom)
A2/307 - Gearbox cover stud nut [ not domed closed nut]
A2/308 - Gearbox cover stud washer