Outside Thickness Position of diameter basic dia D T ℓg DPO HSS Spiral Pointed Dies Size Class Code D T Clearance Type Stock (for blind hole) Spiral Fluted Taps Holes (mm) (mm) 7/8-9UNC 2A PDPU14WGNEBC 55 22 5 1 7/8-14UNF 2A PDPU14QGNEBC 55 16 5 1 1 -8UNC 2A PDPU16XGNEBC 55 22 5 1 1 -12UNF 2A PDPU16SGNEBC 55 16 5 1 (for through hole) Spiral Fluted Taps For G Threads G1/8-28 - PVHG0020NEBC 30 11 4 1 ● G1/4-19 - PVJG0040NEBC 38 10 5 1 ● G3/8-19 - PVLG0060NEBC 45 14 5 1 ● (for through hole) Spiral Pointed Taps G1/2-14 - PVLG0080NEBC 45 16 5 1 ● G5/8-14 - PVPG0100NEBC 55 16 5 1 G3/4-14 - PVPG0120NEBC 55 16 6 1 ● G7/8-14 - PVSG0140NEBC 65 18 6 2 Hand Taps G1-11 - PVSG0160NEBC 65 18 8 2 ● G1 1/4-11 - PVUG0200NEBC 75 20 8 2 G1 1/2-11 - PVXG0240NEBC 90 22 8 2 Size Class Code D T ℓɡ Clearance Type Stock Carbide Taps Cemented Holes (mm) (mm) (mm) For NPT Threads NPT1/8-27 - PDJNT020NEBC 38 10 5 4 3 NPT1/4-18 - PDJNT040NEBC 38 15 8 5 3 NPT3/8-18 - PDLNT060NEBC 45 15 8 5 3 Roll Taps NPT1/2-14 - PDLNT080NEBC 45 19 10 6 3 NPT3/4-14 - PDSNT120NEBC 65 20 10 6 4 NPT1 -11.5 - PDSNT160NEBC 65 25 12.5 8 4 Simple Inspection Tools Special Thread Taps Pipe Taps Thread Mills Dies Center Drills Centering Tools DIN Di-4 181