How thick can the metal be for a common NMO antenna mount? I know they're meant for sheet metal but can they go as thick as 1/4"?
Edited to add: By "common", I mean NOT the ones designed for extra think applications. If you look on Amazon, or anywhere else, you will see many NMO mounts from many vendors that all look exactly the same. They are the kind I mean. I would like to know how thick the metal can be for one of those.