Polaris ATV rack connector (not-quite-lock'n-ride)

This is a 3D-printable replacement for the Lock'n-Ride connector from Polaris. It's probably not as good as the real thing, but it seems to work ok. Use an 8mm screw w/hex-nut and some spacers. As you tighten the screw, the two parts are pushed apart and stick in the hole.

Some rubber tape around the device helps it stick even better. And careful, since the screw sticks up and you may hurt yourself and others if you fall on it or something like that...