When building rack cases that are stackable, one way to do it is to use stacking female on the under side of the case and male feet on the top side of the cases. Female stackable feet work better on the under side of the case because it has a larger surface area and serves better as feet when not stacking.
Armor Steel Stacking Foot Male Zinc Chrome
$2.75
Stacking feet are used mostly on rack cases. Stacking feet work in pairs. This is for one male stacking foot.
