Screw-cap / thumbscrew with socket access for DIN912 screws

This is a screw-cap for DIN912 socket head screws, which allows tool-free hand tightening, while still providing access to the hex-socket if (or WHEN...) push comes to shove.
After printing just press the cap onto the socket-head using a simple vise - no glue needed!

I've provided models for sizes M3, M4, M5, and M6, and tested them all using a DLP printer. naturally, printing the M3 size with an FDM printer is... less than optimal. ;-)

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https://www.linkedin.com/in/talcohen491/