what size of a drill bit and tap do I need to install the take-down bolt insert in my riser. I think the tap is supposed to be 1/2 inch but 1/2-20 or 1/2-13 or other ? I have a drilling jig on the way from Bingham but their shipping is painfully slow so I don't know when it will arrive. Thanks for any information.
27/64th drill
1/2-13nc bottoming tap
Great ! Thanks !