9. Comparison of pitch diameter tolerance Intro For Forming Tap Metric Coarse Thread (M) Basic Pitch (+) μm SP Dia. 0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 420 JIS 1 35 JIS 2 G3 G4 60 SL M1 × 0.25M1.2 × 0.254H 45 5H ISO1X 56 6H ISO2X 71 ISO1X (5HX) Class G for JIS 2 Internal threads PO JIS 1 45 JIS 2 G3 G4 56 ISO2X (6HX) M1.1 × 0.25 4H 45 ISO3X (6GX) 5H ISO1X 566HISO2X71 Internal threads 4H JIS 1 Class Internal threads ST Internal threads 5H JIS 2 Class Internal threads JIS 2 G3 G4 G5 60 Internal threads 6H M1.4 × 0.3 6H ISO2X 75 Internal threads 6G 18 6G ISO3X 93 ROLL JIS 2 G4 G5 G6 85 M1.6 × 0.35M1.8 × 0.356H ISO2X 85 19 6G ISO3X 104 CARBIDE JIS 2 G4 G5 G6 70 M1.7 × 0.35 6H ISO2X 85 19 6G ISO3X 104 LONG M2 x 0.4 JIS 2 G4 G5 G6 70 M2.3 x 0.4 6H ISO2X ISO3X 90 M2.2 x 0.45 JIS 2 G5 G7 95 HAND M2.5 x 0.45 6H ISO2X ISO3X 95 TAPS JIS 2 G5 G7 80 M2.6 x 0.45 6H ISO2X ISO3X 95 EG (STI) JIS 2 G5 G6 G7 100 6H ISO2X ISO3X 100 M3 x 0.5 20 6G D5 120D7 SPECIALTHREADS, GAUGES JIS 2 G5 G6 G7 G8 90 M3.5 x 0.6 6H ISO2X 112 21 6G ISO3X 133 THREAD MILLS JIS 2 G6 G7 G8 118 M4 x 0.7 6H ISO2X 118 22 6G ISO3X 140 DIES JIS 2 G6 G7 G8 100 M4.5 x 0.75 6H ISO2X 118 22 6G ISO3X 140 CENTER JIS 2 G6 G7 G8 125 DRILLS M5 x 0.8 6H ISO2X ISO3X 125 24 6G 149 Technical info 657