RC Boat Floating Hatch Bolts.

cults3d

I was tired of dropping screws overboard at the edge of the lake. I use this on the Spray Jetboat to lock down the hatches. It is a simple print with a hollow torus inside that allows it to be just slightly buoyant. Pop a heat set threaded insert into it and its an attractive solution with no tools needed. Inserts here: https://amzn.to/2Rddrkz