30mm box section end cap or foot
by Wired1, published
Push-in foot or end cap for 30mm box section steel.
Handy if you are fabricating something like a table, or in my case a gravity racer, and want to clean up the open ends of a few chassis parts.
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Just print it and when it cools down, press it into the box section.
I printed these at 40% fill with 2 perimeters and tops & bottoms.