OK. Now we know it is wood,If you can give me the dimensions from the top of the nut to the top of the portion in the base that it threads into(with the threads barely engaged top and bottom and then with them scewed down or fully engaged) that will give me the parameters to work with and I'll see what I have.I have mostly Stanley Planes but I do have a few cman so I can check the front knob diameter from what I have. To the best of my knowledge Crafstman did not manufacture their planes, they were farmed out to the people that did, ie, Stanley,Sargent and probably some others,so with any luck at all I probably have something that will fit.It may not be the perfect replacement but it should work. It all boils down to how original you want it to look. Check it out and let me know. Jim