9. Comparison of pitch diameter tolerance Intro For Cutting Tap Metric Fine Thread (MF) SP Basic Pitch (+) μm Dia. 0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 420 MF1 × 0.2 MF1.1 × 0.2 P1 4H 40 SL MF1.2 × 0.2MF1.4 × 0.2ISO1 ISO2 MF1.6 × 0.2 P1 4H 42 MF1.7 × 0.2 MF1.8 × 0.2 ISO1 ISO2 PO MF2 × 0.25 P1 P2 4H 48 ISO1 (4H-5H) ISO2X (6HX) MF2.2 × 0.25MF2.3 × 0.25ISO1 ISO2 5H 60 ISO2 (6H) ISO3 (6G) Internal threads 4H Internal threads 6H P1 P2 4H 53 ST MF2.5 × 0.35MF2.6 × 0.35ISO1ISO2 5H 67 Internal threads 5H Internal threads 6G 6H 85 P1 P2 4H 56 ROLL MF3 × 0.35MF3.5 × 0.35ISO1ISO2 5H 71 6H 90 P1 P2 P3 4H 63 MF4 × 0.5 CARBIDE MF4.5 × 0.5MF5 × 0.5ISO1 ISO2 ISO3MF5.5 × 0.55H806H 100 20 6G 120 MF6 × 0.5 P1 P2 P3 4H 71 LONG MF7 × 0.5MF8 × 0.5ISO1 ISO2 ISO3 5H 90 MF9 × 0.5 6H 112 MF10 × 0.5 20 6G 132 HAND,TAPS MF6 × 0.75MF7 × 0.75MF8 × 0.75 4H 85P2P3P45H106 MF9 × 0.75MF10 × 0.75ISO1 ISO2 ISO3 6H 132 MF11 × 0.75 22 6G 154 EG (STI) 4H 95 MF8 × 1 MF9 × 1 P2 P3 P4 5H 118 MF10 × 1MF11 × 1 ISO1 ISO2 ISO3 6H 150 SPECIAL 26 ISO2X 6G 176 THREADS, GAUGES 4H 100 MF10 × 1.25 P2 P3 P4 5H 125 MF11 × 1.25 ISO1 ISO2 ISO3 6H 160 THREAD 28 ISO2X 6G 188 MILLS 4H 90 P2 P3 P4 5H 112 MF12 × 0.75 ISO1 ISO2 ISO3 6H 140 DIES 22 6G 162 MF12 × 1 4H 100 MF14 × 1 MF16 × 1 P2 P3 P4 5H 125 CENTER MF18 × 1MF20 × 1 ISO1 ISO2 ISO3 6H 160 DRILLS MF22 × 1 26 ISO2X 6G 186 Technical info 648