This is not exactly NASA wrench, but it is also easy to print and you can use it in so many different ways (see complete video below :)
See below for file-by-file guide ;-)
I'm trying to learn with Fusion 360 and this was next challenge for me.
I'm fan of HAND TOOL RESCUE YouTube channel. This guy is really amazing in restoration old tools and devices. One of his project was resurrection of historical wrench (originally patented in 1879 by Charles Billings). As he offers this resurrected mini version on www.handtoolrescue.com, you can now also print one from your favorite plastic.
Be sure to check his video how to made this wrench in "old-school" (not 3D printed) way :)
Tested filaments: PLA, PET, CPE-HG100 (Fillamentum) and PC Max
HOW TO PRINT
Most easiest way: Put all 3 STL files in slicer, turn supports ON (from bed only), resolution between 0,1 mm and 0,2 mm, infill between 20% and 80% and hit RUN button ;-)
There is 3 different parts.
is easies one. Just print it without supports with no higher layer than 0,2 mm.
You can use supports, but it went fine also without them. Again, for thread isnt good to try something above 0,2 mm layer height.
If you wish to really tight something with wrench, use higher infill, at least for part with thread. I tested PC MAX with 100% infill and it can really handle nuts and bolts. For toy/model purposes also 20% infill will work.
Here you will need supports. With Slic3r PE works "only from printbed", but be sure that you get also supports in the middle, as shown on picture below
Actual size is good enough for 0,4 mm nozzle, so I can't recommend downsizing, but you can make this thin even bigger.
Prusa printbed can handle 190% size of original STL models, see: