I pulled out my ammeter isolator block and while it has issues, I think I can fix it.
However, my disassembly manual notes the isolator is held to the body with "2 - 5/16 head, flanged, #10, 3/4" long." It further notes no id inside of the head.
A #10 goes into the sheet metal nice so this appears correct.
Is this correct and is the finish S7?
I'm also missing the lock washer and nut.
Plain hardware in an S7?