Tom above your torch handle is the UN-J mixer/elbow. It is probably not made by or for Victor but is a clone from Gentec or some company in Asia. It has Victor 5/16" X 27 tpi threads. All the tips from G-tec have the same heads. In fact all the TEN designated tips (either single or multi-port) from any company will screw directly on to the end.

The small end piece next to your UN-J was made for Paige Tools to convert Victor threading into Meco 1/4" X 28 tpi threads. Unlike Victor/s this is a common thread. The jewelry craft liked using the Meco Midget torch handle so most of their after market tips (Meco and Paige) have 1/4" X 28 threads. Unfortunately for us, Meco got bought out by Victor and the Midget torch handle has not been made since 1978. Just recently the supply for sale has run out. So that puts the future supply of tips using 1/4" X 28 tpi threads in jeopardy.

My recommendation to you Tom is to not use your one UN-J mixer/elbow for all tips. I'd buy another one. They are designed to screw on the torch handle by hand because they have O rings to help seal them off. Taking the Paige adaptor on and off frequently is not a good idea.