[Michael C Henry]

You now have something in the hole to keep dirt out. The original hole was a 1/4" x 28 thread with a taper like pipe thread. You have to be careful that as you screw in, you can only advance into the hole. You have to keep asking yourself will it go another turn. The threads on the male portion will get compressed and if you back it up, it will not be as tight. So once it's at the optimum angle and reasonably tight, STOP. Back when, the shop had a product called "LEAK LOCK" a powder blue squeeze tube of goo. It dos exactly what the name says. Getting the part out will be a problem without a torch.