Century Drill & Tool 98307 Hexagon Die, National Pipe Taper Thread, 1/2-In. x 14
1/2″ x 14 National Pipe Taper Thread, 1-7/16″ Across, Hexagon Die, Carbon Steel, Ideal For Plumbing, Air Applications & For Rethreading Where High Accuracy & Tolerance Thread Is Not Critical, Recommended For Use With Hexagon Die Stock, Die Can Be Used With A Wrench Or Socket When Space Is Limited, Designed For Hand Threading Work In A Variety Of Materials.