123 Block 3rd Hand Adapter

Handy little adapter for attaching coolant tube style soldering 3rd hands to 123 machinists blocks to create an even more handy 3rd hand tool. If you aren't familiar with 123 blocks then you should check out Adam Savages tested video on these things. I can't say I've used them as intended but they are a super versatile tool to have in a makers kit.

Essentially this is just a 1/2" -20 UNF female (coolant tube) to 3/8"-16 male (123 block) adapter. I've included a version with a long section of 3/8" thread and one with a short section of 3/8" thread. The short one is more than sufficient to secure the the tube to the 123 block.

Items need.
-123 blocks - A set can be purchased for cheap on Amazon
-Flexible coolant tube with a 1/2" threaded end (both 1/4" and 1/2" products pop up on Amazon, I purchased mine from Sparkfun a few years ago). These can also be 3D printed but tolerances can be a bit tricky.
-Alligator clips