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 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 Feet Female Zinc Chrome
$2.75
Stacking feet are used mostly on rack cases. Stacking feets work in pairs. This is for one female stacking feet.
