I installed the AN3-13A bolts then realized I chose the wrong Cover Rib so removed the bolts and found badly galled threads. We all know these all metal locknuts work like platenuts (nutplates?) and are deformed to apply an interference fit as the locking mechanism. But is it normal to get this kind of galling? The photos show the relative location of the nut when installed. The bottom of the nut is not deformed and does not cause galling. Nylock nuts are re-usable but I have not read that all metal locknuts and the bolts they are installed on are one time use only. I will not reuse these. I this normal?