Construction technique: Tab and Slot with T-nut

Drafting: Sheet metal slot and tab joints tab and slot joint The first panel also includes a tab which engages a locking slot formed in the second panel to prevent accidental parallel movement of the first tab and slot weld I'm curious how different fabricators design their tabs and slots Do you make your tabs flush with the mating surface, or do you recess the

tab and slot welding table Blind Joint Components - Nuts for Pre-Assembly Insertion Double Joints Joint Nut for 8 Series Aluminum Frames from MISUMI