I broke a 1/4" - 20 NC tap and am trying to replace it. I've located an inexpensive one (my set is inexpensive as I don't really require much) and it's described as 1/4" - 20 NC for 7/32"..also it's described as for "re-threading". So, two things. 1) I'm tapping a freshly drilled hole in soft steel...would this tap be appropriate as it seems to be designed for re-threading a previously threaded hole, no? Is it going to survive cutting new threads in soft steel? 2) I'm also confused by the for 7/32" part of the description. On my chart for tapping that came with my set it says to drill a 13/64" pilot hole for the 1/4" - 20 NC tap. That's the size of hole my tap broke off in....(it had bottomed out but I kept turning...doh!) What I'm doing is drilling into the side of my table saw miter slide bar in several spots and I'm inserting nylon threaded set screws in order to take up the slack in the miter slot. Thanks for any help.