Good day fellow C-Body Lovers! Restoring a 1698 Polara Coupe. Converted from Drums to Four Wheeled Disc's. I noticed that when I was cleaning up parts, that I wanted to chase the Bolt threads for the Caliper Brackets and the Brackets themselves. The Bolt 1/2 20 NF has an extended nose that helps align the Caliper Bracket. My 1/2 20 NF Die would not fit over this nose tip! So down to my local Bolt Supply House, where with Bolt in hand, they could look it up. low and behold, there it was in the book, and the Die for chasing the thread a 1/2 20 NF!!!! Okay whatever! Back at the Workbench I start chasing threads and noticed that it was taking just a tad bit of tread but not a lot. These machine tolerances are a bit off. The Tap runs through just fine. Any thoughts?
