Rigid 47750 DIES, UNIV 1-2 NPT. The Rigid 47750 DIES, UNIV 1-2 NPT is a pipe for a 504 Quick Opening Threader. The Rigid 47750 DIES, UNIV 1-2 NPT is a High Speed RH. The Rigid 47750 DIES, UNIV 1-2 NPT has a National Pipe Thread of 1" to 2" and a TPI of 11-1/2.