Yeah, but glue? I can just see that flying off at an inopportune moment that way.....
And I don't see any holes for nailing to the shaft. Does one drill them? and if so, how?
A drill press would be ideal, but a hand drill will work.
Shave your haft/handle so that there's a nice tight fit in the head socket and make sure it's fully seated.
Remove, goober the shaft and socket with epoxy, re-insert (seating fully), clean up excess epoxy (quickly) and leave it overnight.
Find a piece of mild steel rod that you will use for your pin. Select a drill bit the same size (or 1/32 larger) as the pin diameter. Drill a hole from the bottom flange, through the shaft and out the opposite side of the flange. Try to keep everything nice and even while coming out 180 degrees from where you started.
Cut the rod just long enough that that you will be able to peen both ends once pushed through the hole. Peen one end in a vice first, insert the rod, peen the other end and clean up both peens so that they are pretty.
Buff to remove burrs and other ugly stuff.