Helicoil from McMaster-Carr 18-8 Stainless Steel Helical Inserts 91732A201 calls out a specific tap to use, but I cannot find out what thread this tap is putting into the hole for the insert. I want to call out the tapped thread on a drawing, and put the 2-56 insert in later. I cannot find what the thread should be. This would be the outside thread of the helicoil. I know the drill size is #41 = 0.0960 but what is the thread size?