Общий каталог OSG 2018 - 2019 - страница 676

STI Drill Size S. T. I. SCREW THREAD INSERT Tap Drill Sizes - STI Taps - Metric Minor Diameter (in)Tap SizePitch(After Tapping)Tap Drill Diameter (Metric) Min Max Aluminum Steel, Magnesium,Plastic M2 0.4 2.087 2.199 2.1 2.1 M2.5 0.45 2.597 2.722 2.3 2.35 M3 0.5 3.108 3.248 3.15 3.2 M4 0.7 4.152 4.332 4.2 4.25 M5 0.8 5.174 5.374 5.2 5.3 M6 1.0 6.217 6.407 6.25 6.3 M8 1.25 8.271 8.483 8.3 8.4 M10 1.5 10.324 10.560 10.5 10.5 M12 1.75 12.379 12.644 12.5 12.5 M14 2 14.433 14.733 14.5 14.5 M16 2 16.433 16.733 16.5 16.5 M18 2.5 18.541 18.896 18.75 18.75 M20 2.5 20.541 20.896 20.75 20.75 M22 2.5 22.541 22.896 22.75 22.75 M24 3 22.649 25.049 24.75 24.75 The suggested drill sizes for aluminum listed in the table are within the minor diameter limits for STI tapped holes specified in MS 33537. Alternate drill sizes are suggested in many instances for magnesium, steel and plastics to provide for maximum tap wear life. In the case of magnesium, the larger size is recommended to allow for material close-in. There are suggested drill sizes and any special requirements or specifications will supersede these recommendations. 676 Threading Technical WWW.OSGTOOL.COM