I purchased the 1/2"-13 which require a 0.631" hole. Closest fractional I could come up with was a 5/8" bit. I also did not have a special tool to install. I used these to attach a trailer sway control link to trailer frame. I drilled the holes, placed the bracket over top and tightly clamped the bracket to the frame to pinch the rivet nuts. Then used an impact gun and it sucked up and set the rivets with no issues. Very happy with them and it's the right way to attach items to thin frame steel.
Circuit Performance Forged Steel Extended Open End Hex Lug Nut for Custom Wheels: 12x1.5 Purple - Set of 20 + Tool
6 Review
PGMJ 80 Pieces M8 Wood Inserts Bolt Furniture Screw in Nut Threaded Fastener Connector - Hex Socket Drive for Wood Furniture Assortment (M8x20mm)
3 Review
100-Pack Fullerkreg Stainless Steel 10-32 Nylon Insert Hex Lock Nuts - Durable & Secure Fasteners
4 Review
304 Stainless Steel Machine Screw And Hex Nut Assortment Kit - 170 Pieces By T.K.Excellent
4 Review