PureX Turbo Lock joint pin

I got a PureX shaft with a viking cue I purchased. It has a brass insert with an open thread-less guide area then threads. They are a 5/16"x?? neither 18 or 14 tpi pins thread into it. The threads are in great shape, so assume it's some goofy proprietary thread pitch. Is anyone familiar with these that can let me know what it is? I found a PureX joint called a "Turbo lock joint" but no description of it. I am guessing this shaft is for one of those, but I am just guessing.
Thank you

I found this thread. It was never confirmed, but it looks like it could be a 5/16x10 Mine looks to me to be more of a fine thread than a 10 but I don't know, It may be.

2026 WNT Ranking event- Chinese Taipei Open, 8-11 Jan2026, Winner $30K

That and you might beat someone to death with the butt end of it lol
I flew from Istanbul, Turkey to Heathrow Airport in London for a pool tournament back in 1990 and that was when you could carry cues in the cabin.

I was in a hurry in Heathrow and was running through the airport carrying my Fellini cue case and the airport police stopped me and made me open my case.

Guess they thought I was carrying a machine gun.

Some things must come to an end

Well it`s been a great long run selling these milk dud tips for the past 15 or so yrs, but my wife has breast cancer and my 90 yr old father is having some health issues, so its time to close this chapter in my life. You`ll still see me at the SBE show ever year barring any health issues that my family members may have. I would like to say a big thank to everyone that I have met and made friends with over this long run here on azb. I will not be selling or making any more milk dud tips going forward. I may in the future be selling my tip presses that I made and used during my tip process, but that will be done at a later date and time. Thanks again for this great ride
Take care
Jeff
You and your family are in my prayers. I wish you the best possible outcomes going forward.
🙏

Can’t help but laugh…

US Army 1968 Fort Bragg. I routinely took a debt collector with me when I hit the Battalion Day Room. I had many that thought they weren't going to pay up. My collector was a logger from Oregon, big fellow loaded with muscles and a mean look on his face. They always offered the money right away. Only once did he raise his voice. I had won so much money in a 5 way ring game that both pockets were full. These were unfriendly Mexican fellows from Texas. I tried to leave and they insisted I was not leaving. He stepped forward and said "He's leaving with me and if you don't like it, I'll stack you all up like firewood." Yes, I gave him a cut of the winnings.
Not good to make enemies. Had a good friend and someone knocked on his front door and shot him on the head. I don't like loose ends.

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