I wanted to fasten down my hot tub cover with 2 inch webbing, so I purchased this “Plastic Buckles, Heavy Duty Side Release Buckles, Dual Adjustable parachute buckle, Plastic clips for Webbing straps (2 Inch,4 Pack)”. I needed to mount the straps to the deck. I replaced the female part with this model mounted to the deck surface with deck screws. 

It works very well. When doing a stress test the purchased part failed, not the 3D printed part.

OpenScad source file included.