Agreed. I wonder what it was needed for. If bin it today, I'll need it tomorrow.Looks home made
There are some extremely faint markings on the shank, 1/2-2??? My thread gauge indicates 25tpi.Are you sure it is not metric?
Apparently Springfield Rifles used 25 tpi.Pointed crests, massive long lead-in and a large diameter pilot. My guess is it was made for some kind of antique firearm.