Summary Wanted to stop the cap-head screws on my new FlashForge from sinking themselves into the frame as time goes on. It's a holiday, and the hardware store was closed - but why would I not print these anyway? Washers are split to allow for insertion without full disassembly. There's a recess for the cap head to sit in so that they stay seated and don't slip out while assembling. They're not the prettiest but they print quick and tighten down nice. Let me know if you'd like to see changes or alterations! Update: Added a "thick" version. This has an under-head seat of 1mm instead of 0.5mm for the standard version. I printed a few of these to use on certain screws along the frame but this thickness sometimes requires full bolt removal. For this reason it's not a V2 - they both have their uses.