いろいろ 1/4-20 unc 2b tap drill size 136078-1/4-20 unc 2b tap drill size
Metric ISO Fine Tapping Drill Sizes, Metric ISO Coarse Tapping Drill Sizes, UNC UNC, UNF UNS, BSW Whitworth, BSF, BSTP Taper Pipe, BSPF Parallel Pipe, and NPT Taper PipeAs a rule of thumb, for Metric threads, the tapping drill can be calculated by subtracting the pitch from the diameter of the thread eg for an M5x0 75 thread the tapping drill is 5075mm = 425mm For Imperial (inch) threads the tapping drill size is calculated in the same way, diameter minus pitchTitle Tap Drill & Clearance Holes for Screw Threads 080 to 05 inchxls Author Richard Wegner Created Date 7/6/09 PM Tapping Drill Size For Thread Forming Guhring 1/4-20 unc 2b tap drill size