Starrett 472 Screw Pitch Gauges – V, Unified, American National – 60° Threads Screw Pitch Gauges – V, Unified, American National – 60° Threads – Each

With Locking Device and 11 1/2 and 27 Pipe Thread Pitches
Threads per Inch (TPI)
First Corner 17 Leaves: 4, 4 1/2, 5, 5 1/2, 6, 7, 8, 9, 10, 11, 11 1/2,12, 13, 14, 15, 16, 18,Second Corner 17 Leaves: 20, 22, 24, 26, 27, 28,30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50 Third Corner 17 Leaves: 52, 54, 56, 58, 60, 62,64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84