For some reason when I was looking I couldnt find one of these. Just happen to see one when I was just cruising around.
This is a lock for peg hooks on a Standard 1/4 peg with 1 inch hole spacing. I print with a 15/20% infill which is probably over kill but Im killing off left over spools.

These lock pretty dang nice!! Hopefully ill be putting out some more peg board accessories