Here is a pic of the cross feed nut that I re-made for 
my pre-war Rivett 1020. It ended up being slightly off, 
so I had to do a bit of shimming to ensure the screw 
didn’t bind.  I single pointed the thread, the bore 
was .400” for a .500 x10tpi Acme.  

Thanks for looking, 
Brett Flemming Vancouver,WA