Bayonet Connector (Female)
Required a Bayonet connector for a respirator mod I was working. Couldn't find anything, so designed my own! Used Waagstrom's Male connector as a quick reference and visual guide.
Recommend printing mostly solid, with supports. The pins are rather small, though it can be incorporated a few ways, which provide more support to them.
I've attached the STL and Autodesk 123D file. Might have to take off a bit of the inside, depending on design.