Review on Yosawa Connector Housing Terminal Assortment by David Herman

If you plan to use them on pigtails or separate wires, they're great for that. But if your goal is to fit the plug in the box, your tolerances need to be exact. The photo shows a 5.1mm body and 7.65mm flange. Actual measurements 5.0 and 6.2. This means you have a little over 1/2mm flange on each side to hold the plug in the box. Worst of all, the small tab that attaches the plug to it sticks out twice as far beyond the flange. So you need to develop a notch for it. If you're working with two wire connectors, you're talking about very tight tolerances to try to 3D print a box for those connectors.