I wonder if it's possible to use certain screws/spacers in a wave soldering machine, so that it will be possible to screw a screw to the spacer attached to the PCB afterwards?
My intial thought is that maybe a titanium screw/spacer might work due to poor Solder-ability but I have no clue if that works.
To understand the problem; I've a heatsink that has to be screwed to the PCB before soldering the TO-220 packages to the PCB. The reason to this is to minimize stress on the legs due to the stiff fitting till the heatsink (only available solution for my application). So I would like to find a solution where it's not necessary to hand solder this specific part, which is the case right now.