Nick Attached are photo's showing the fasteners on a ‘37 and ‘46 Chevy 1/2 ton. The first photo shows a rivet was used on the ‘37. Note the top end has a round and domed shape.
The 2nd photo shows a fastener I am uncertain is year correct. A short bolt with a nut was used. The bolt head is also round and domed without a slot for a screwdriver. I don’t recall if it was received that way in the parts pile that came with the truck many years ago. Either way, it works just fine as is.
Note too this ‘46 was assembled among the first produced after the war. So it’s possible this regulator might be atypical to later production models?
