No Loctite, I don't have dimensions sorry, I did have a look in my box to see if I had one of the old mushrooms but no luck, once you remove them they will be easy to replicate, I made mine on a small hobby lathe that I had at the time, nylon 66 will probably work fine if you seat them prior to fitting, air pressure keeps them closed so as long as the seat is good it should work fine,