Where to buy Jayco stock am/fm antenna

I think that a larger diameter screw or drill all the way through and use a longer screw and a nylon lock nut to tighten. put some Loctite on the nut and around the head and you'll be pretty watertite.

Then again, if you really want another antenna, I'd send you one but the screw hole is the clearance hole and the threads were in the other half of the ball and that was part of the base. PM me if you want it.