This is a button we designed for our Kinematics system to integrate a 3D-printed closure. It is a simple snap style button. It was intended for printing via SLS in nylon. However, the design also tested well on our Makerbot with ABS, though I'd recommend scaling it up slightly. The units are in mm.

There are 3 files. One is a test file that is ready to print. The others are the two components of the snap as open meshes that could be added to other shapes.