Gear box cover nuts - Sturmey Archer CS gearbox (each) 1/4 inch (6.35mm) x 26tpi, correct shaped nut with shoulder. Suits early Nortons with Sturmey Archer counter shaft (C.S. Type) gearbox and all other machines of the period with SA CS boxes. NOTE: Sturmey Archer used their own thread forms. Some original SA gbox studs appear to be their own thread size and was approximately 1/4 inch + 1/128 inch or 0.25007 inches approx 6.5mm x 26tpi. Note this nut does not fit LS gearbox with 17/64 inch stud eg some AJS Suit Nortons 1922 - 1933 Original part number Norton: 4675, 9662- Gear box cover stud nuts Norton: 2480- Gear Box Cover Stud, with Nut and Washer Sturmey Archer: CS10; FS53 - gearbox cover nut
