When you need highly conductive fasteners, there really aren't a lot of options out there. Aluminum is the most conductive metal you can buy bolts made of, but it has contact resistance problems that make it unsuitable for our needs. Brass doesn't get much better than 25% IACS, but it's pretty much what you have to settle for... Copper bolts just aren't made at all, unless someone with a lathe owes you a favor.
-F
@mell It's rather complicated to explain but i can if you want to!
-F
long, application for conductive fasteners
@mell so we're doing some tests on devices that involve really fast high-current pulses, and we need to be able to accurately measure those pulses. That will require a bandwidth of at least 500 MHz on our current transducer, which is Very Hard; even the very best current transformers on the market only reach 200 MHz.
So we looked around and found a company making coaxial current shunt resistors with bandwidth ratings of up to 2 GHz, which will definitely work.
The one we're planning on buying mounts to a PCB with a screw terminal, using a non-plated through-hole with annular rings on both sides.
If we're not using the current shunt, in order to make the circuit work, we need to connect those two annular rings together with some other sort of thing, and the best thing for it would be a conductive screw and nut
-F
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long, application for conductive fasteners
@Felthry thank you for explaining! I understand now. that's a tricky one. I can't really think of a better easily-removable solution.
good luck!
@Felthry what's your application if you're willing to explain? not that I can help, I'm just very curious.