My new bow doesn't have the arrowrest hole threaded. It's there but not threaded. Does anyone know the size that the tap should be to thread it. Thanks

if its new take it back!

Which arrow rest hole? There are three sets of sight/rest mounting holes above the arrow shelf. Mount the sight first then the rest onto the sight (that's how mine works). If you are talking about the holes in the top and bottom of the riser for a two-piece quiver, they aren't supposed to be threaded. The rest mounting tube fits in the hole and a screw goes in the other side and screws into the rest mounting tube. That's how the new two-piece AR quiver works (or at least that's how they are supposed to work, since I ordered my two-piece quiver six weeks ago and still haven't seen it it's tough for me to verify...)

If the rest hole isn't threaded, it's 5/16"/24 thread.

Got it threaded. Took about 2 minutes with a 5/16 24 tap. Thanks everyone for your help.