Yep, those are crimped in 1/4-20 nuts. You can get replacements (although weld-in) at McMaster Carr.
Weld Nuts

The screws are oval head machine screws (mine were phillips head).

Last edited by klhansen; 02/25/2021 4:43 AM.

Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.