Gearbox axle sprocket locking plate screw, suits Norton gearboxes 1934 - 1968. 2BA x 3/8 inch domed headALSO AMC Gearbox inspection cover screw 1957+Original part number:3333; 9716; A2/371; 000450 - axle sprocket nut locking plate screw000450 - gearbox shell, inspection cover pins (AMC gearbox 1957+)