Nylon standoffs

they are holding tiny rectifier bridge pcbs that i got from parts connection, only one hole with three other standoffs to hold the corners in place.....I was hoping to lock the black standoff in place as it is two pieces i guess i could use a metal lock washer

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Drawing those in KiCAD is a 15 minute max job.

A boardhouse can make the boards in the color you want, with M3 mounting holes (PCBs should have them, period) for real safety, with industry standard 5.08 mm connectors, your own name on them being the Kanye West in PCB design and they will probably be cheaper too.

If you are hardcore you could add footprints for the caps too and you’ll have a nice smaller and more sturdy solution.

What voltages and currents do you need? I may have a simple design.
 
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A construction tip is to do things both mechanically and electrically safe. Looks often pleasing too. My own demand is that stuff should be able to fall from a table and still works OK.

Just a simply tryout with (too large) 25 mm caps but they are real Celticray® boards. Of course it can be made symmetric/dual voltage.
 

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I tried to learn to design a simple cap mounting board and became frustrated trying to learn about layers and traces vs ground planes and board thickness. Then how to order the holes through plated etc. What you guys think is so easy is not for a novice. I can manage to order boards designed by someone else but you guys are fooling yourselves if you think designing that board is anything but challenging. Looking for an nylon adhesive is not looking for a cludge IMO.
 
Am I the only one who finds it disappointing that Parts Connection would make a PCB available that doesn't have mounting holes? That's pretty lame.

Tom
It looks like it's intended to be soldered to a second PCB using pins through the 4 holes on the side. Probably to replace a SIP full bridge rectifier. Mounting holes wouldn't be needed in that situation.