Serving Hobbyists for Over 50 Years
All are 2-piece design like the original with 7/16-14 thread. The 1-1/2 diameter are actually nuts from a Model A that will work. The authentic one is the correct Model T design with high domed clad.
The coarse threaded carriage bolt that the prop nut screws on to.
Special lock washer for the prop nut.