trailer stake pocket pin
thingiverse
I made a folding trailer with stake pockets on the walls, creating these for the retaining pins on the pockets so I wouldn't have to reach around the other side of the trailer frame to bolt something in. You will also need a 5/16" x 3 1/2" bolt (head should be 1/2"), two 12mm x 3 mm round rare earth magnets, and some jb weld. The magnets are tight so you might have to press them in but the bolt should just drop in. The bolt is the retaining pin and this with the magnets keeps the bolt firmly in place.
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