23412, NM 23412, and 06-2536 are the listed norton part # for 68-75.
FWIW the original hardware 5/16-18 W and has a 7/32 allen wrench.
SAE has 1/4 hex.
I'd rather have the correct screws which also allows me to use the same wrench for the 3 head steady screws which are 5/16-22BSF (7/32).
You can't even rely on the parts dealers to supply the correct hardware...DAMHIK....