Sorry for the delay, my car's been down since last night so my movement has been a little restricted. Here's what I have so far.
http://i214.photobucket.com/albums/cc260/kjcues/McDpininsert.jpg
http://i214.photobucket.com/albums/cc260/kjcues/McDpininsert1.jpg
As you can see, the pin does not extend through the ss collar to thread into the forearm. This leaves the minor diameter of the collar tenon to carry the entire load. Instant shear, certainly not meant for any type of side loading.
The insert is pretty basic. .460" od. x 1.440" long.
The pin on the right is one I made from a ss 3/8" bolt to spin McD. QR shafts when shooting finish. The McD QR thread is 3/8 x 16. The exposed pin is 1" long with 5 threads. I'll add dimensions for the blank guide section of the pin when I return from the shop. Later, KJ
Further info on the McD. pin.
There are 4 exposed threads, or 1/4" of the length. The blank shank of the guidance section of the pin is 3/4" in length x .278" in dia. w/bullet nose.
The insert id. should be machined to accommodate. Further, the insert is counterbored .070" deep x .388" id. at the entrance. Hey, go .390" LOL
The prints may have to wait, my car's my priority right now.