cutting tapforming tapcutting tapforming tapcutting tapforming tapcutting tapforming tapcutting tapforming tap cutting tapforming tapcutting tapforming tapcutting tapforming tapcutting tapforming tap 10. Tap Thread Limits (JIS, DIN, ANSI) Intro Unified Threads (UNC/UNF) Unit: mm SP Kind Majordiameter Pitch Diameter Minordiameter Kind Majordiameter Pitch Diameter MinordiameterSizeoftapClassBasicSizeBasicSizeUpper Tolerance (μm) + Lower Tolerance (μm) + Tolerance (μm)BasicSizeSizeoftapClassBasicSizeBasicSizeUpper Tolerance (μm) + Lower Tolerance (μm) + Tolerance (μm)BasicSize P1 1.524 1.318 25 10 15 1.181 P1 25 10 15 3B 16 6 10 3B 20 8 12 SL 2B 26 11 15 2B 2.515 2.172 32 14 18 1.941 GH1 12.7 0 12.7 GH1 12.7 0 12.7 GH2 25.4 12.7 12.7 GH2 25.4 12.7 12.7 No.0-80UNF 3BX 1.524 1.318 25 13 12 1.181 No.3-48UNC 3BX 38 25 13 PO 2BX 38 25 13 2BX 51 38 13 G3 38 25 13 G4 51 38 13 2.515 2.172 1.941 G5 64 51 13 G5 64 51 13 H2 25.4 12.7 12.7 H2 25.4 12.7 12.7 ST P1 1.854 1.598 25 10 15 1.425 H3 38.1 25.4 12.7 3B 17 7 10 P1 25 10 15 2B 28 12 16 3B 19 7 12 GH1 12.7 0 12.7 2B 2.515 2.220 31 13 18 2.024 ROLL GH2 25.4 12.7 12.7No.1-64UNC GH1 12.7 0 12.7 3BX 1.854 1.598 25 13 12 1.425 GH2 25.4 12.7 12.7 No.3-56UNF 2BX 38 25 13 3BX 38 25 13 G3 38 25 13 2BX 51 38 13 G5 64 51 13 G4 2.515 2.220 51 38 13 2.024 CARBIDE H2 25.4 12.7 12.7 H2 25.4 12.7 12.7 P1 1.854 1.626 25 10 15 1.473 H3 38.1 25.4 12.7 3B 17 7 10 P1 25 10 15 2B 28 12 16 P2 40 25 15 LONG GH1 12.7 0 12.7 P3 55 40 15 GH2 25.4 12.7 12.7 3B 22 10 12 No.1-72UNF 3BX 1.854 1.626 25 13 12 1.473 2B 2.845 2.433 34 16 18 2.156 2BX 38 25 13 2BX 49 31 18 HAND G3 38 25 13 GH2 25.4 12.7 12.7 TAPS G5 64 51 13 GH3 38.1 25.4 12.7 H2 25.4 12.7 12.7 No.4-40UNC GH4 50.8 38.1 12.7 P1 2.184 1.890 25 10 15 1.694 3BX 38 25 13 EG (STI) 3B 19 7 12 2BX 51 38 13 2B 30 13 17 G4 51 38 13 GH1 12.7 0 12.7 G5 64 51 13 2.845 2.433 2.156 GH2 25.4 12.7 12.7 G6 76 64 12 SPECIALTHREADS, No.2-56UNCGAUGES 3BX 2.184 1.890 38 25 13 1.6942BX513813 G7 89 76 13H338.125.412.7 G4 51 38 13 H5 63.5 50.8 12.7 G5 64 51 13 P1 25 10 15 THREAD G7 89 76 13 3B 20 8 12 MILLS H2 25.4 12.7 12.7 2B 2.845 2.502 32 14 18 2.271 H3 38.1 25.4 12.7 GH1 12.7 0 12.7 P1 2.184 1.928 25 10 15 1.755 GH2 25.4 12.7 12.7 3B 17 6 11 No.4-48UNF 3BX 38 25 13 DIES 2B 29 12 17 2BX 51 38 13 GH1 12.7 0 13 G4 51 38 13 2.845 2.502 2.271 GH2 25.4 12.7 13 G5 64 51 13 No.2-64UNF 3BX 2.184 1.928 38 25 13 1.755 H3 38.1 25.4 12.7 CENTER 2BX 51 38 13 H5 63.5 50.8 12.7 DRILLS G4 51 38 13 H2 25.4 12.7 12.7 H3 38.1 25.4 12.7 Technical info 674