Talk Morgan Forums Morgan Sports Cars Morgan Plus Four, Supersport & Plus Six (CX & CXV Generation Vehicles) CX Luggage rack T-bar bolt.

Pretty confident that it is M12 x 1.75.

Changed the mounting of my rear wheel on my 4 seater from a two stud fitting to the same style as the wire wheels, so got a T bar, cut it down and increased the thread length, and used a stud connector to mount to the rear panel. My ebay history shows I bought a M12 x 1.75 die.