I still can't understand how these could get lost. Nobody at this place can really use them. The only thing that comes to my mind is that they might fit on a Cuetec cue. It is also a 3/8-14 screw. It might also be the easiest solution to buy a set of Cuetec joint protectors. The shaft part should just work and the I'm sure one could easily open the butt portion for the large inner diameter of the pin.