stripped Threads coolant fitting Model A

[aquadave]

Thank you all for the advice. I have a few blocks of mahogany that I can make a jig out of to hold the drill straight. I like the idea of taping the drill bit as well so I don't go too deep. All great ideas. I'll let you all know how I make out. I did try a new bolt and it was only marginally better than the old one but still made that little chink sound as it popped out on the last quarter turn.