This is a Snap Ring. This has many common mechanical application, but i have recently been finding many application in 3d Printing prototypes. These can even be used to hold bearings inside of a fidget spinner. Enjoy!
TK3D Printing is a small business that provides on demand printing to local companies. I specialize in custom key chains. Here, on Cults3D, I share some of the files I create. These are only possible through hard work. I hope that these bring you joy and fun! Enjoy