26. Bar diameter for cutting dies Intro Parallel pipe threads (PF - G) A class Unit: mm Taper Pipe Threads (PT. R) Unit: mm SP Major diameter of external threads Bar diameter Size Bar Diameter Size Max. Min. Taper (dia of threads end) Straight PF 1/16 - 28 7.723 7.509 7.56 PT 1/16 - 28 7.5 7.9 PF 1/8 - 28 9.728 9.514 9.57 PT 1/8 - 28 9.5 9.9 SL PF 1/4 - 19 13.157 12.907 13.00 PT 1/4 - 19 12.8 13.4 PF 3/8 - 19 16.662 16.412 16.50 PT 3/8 - 19 16.3 16.9 PF 1/2 - 14 20.955 20.671 20.70 PT 1/2 - 14 20.5 21.3 PF 5/8 - 14 22.911 22.627 22.70 PT 3/4 - 14 25.9 26.8 PO PF 3/4 - 14 26.441 26.157 26.20 PT 1- 11 32.7 33.7 PF 7/8 - 14 30.201 29.917 30.00 PT 1 1/4 - 11 41.2 42.3 PF 1- 11 33.249 32.889 33.00 PT 1 1/2 - 11 47.1 48.2 PF 1 1/8 - 11 37.897 37.537 37.60 PT 2- 11 58.7 60.1 PF 1 1/4 - 11 41.910 41.550 41.60 ST PF 1 1/2 - 11 47.803 47.443 47.50 PF 2- 11 59.614 59.254 59.30 ROLL CARBIDE LONG HAND TAPS EG (STI) SPECIAL THREADS, GAUGES THREAD MILLS DIES CENTER DRILLS Technical info 733