Not sure bout the 46 but I'm working on my 1950 right now and the are; 1/4”-20 tpi x 1/4”lgt. Dog point for the set screw and 1/4”-20 tpi x 1/2”lgt. Fillister head for filler screw. Note the head on the filler screw is not the standard diameter of around .400”. It must be turned down to 5/16 to match the original.
Denny Graham
Sandwich, IL


Denny G
Sandwich, IL