threaded through hole with slot
thingiverse
I designed this for a heated drybox heater, but it will work just fine with any standard 2-conductor electrical wire. Threaded parts are built for a 20mm hole, but the flange should fit snugly in holes up to 26mm in diameter. Both parts have a convenient slot that lets you slide them over a wire without having to cut off the ends to get it through. I'd recommend applying some oil or lubricant to the back nut as it can be a bit stubborn to thread dry, but once tightened down, it's not going anywhere.
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