Many time there will be a need for a new tote bolt. Here is the remedy
At the end of this there are links to where you can buy a 12-20 tap and die, or you can use a 12-24 and just retap the plane sole.
Cut the rod to length and thread both ends.
Cut a piece of brass rod to the right length. (7/16″ for Stanley, 13/32″ for Sargent)
drill and thread the nut. Cut the screwdriver slot.
Tap and die
St. James Bay Tool Company 12-20 Tap and Die Set.
eBay Seller Nicobie sells 12-20 Taps and Dies.
1/4-20 BSW – located on eBay from a UK merchant.
Victor Machinery Exchange 12-20 Tap
Victor Machinery Exchange 12-20 Die