PRAD SYSTEM PRAD system Solution tool PRAD system Specification corresponding with standard blanks(for Japanese market) Material Symbols HSS:○   HSS-Co:●   HSS-P:◎ Main size designation and specification ① ② ③ ④ ⑤ STI ⑥ STI metric unified whitworth sewing screw (metric) (unified) M1×0.25 M1×0.2 M1.2×0.25 M1.2×0.2 M1.4×0.3 M1.4×0.2 M1.6×0.35 №0-80UNF W1/16-60 SM1/16-80 M1.6×0.2 M1.7×0.35 M1.7×0.2 M1.8×0.35 M1.8×0.2 M2×0.4 №1-64UNC SM5/64-64 №1-72UNF M2×0.25 M2×0.4 M2×0.25 M2.2×0.45 №2-56UNC №2-64UNF M2.2×0.25 M2.2×0.45 M2.2×0.25 M2.3×0.4 M2.3×0.25 M2.3×0.4 M2.3×0.25 M2.5×0.45 W3/32-48 SM3/32-56 M2.5×0.35 SM3/32-100 M2.5×0.45 M2.5×0.35 M2.6×0.45 №3-48UNC №3-56UNF M2.6×0.35 M2.6×0.45 M2.6×0.35 M3×0.5 STI_M2.2×0.45 STI_№2-56UNC №4-40UNC №4-48UNF M3×0.35 M3×0.6 M3×0.5 M3×0.35 * Corresponding pitches meet with the pitches of other kinds. * Concerning Hand of threads, both right and left are applicable in the same blank. * Concerning the kind of taps, SP, PO, HT, ROLL are applicable in the same blank. * Concerning applicable thread limits, maximum applicable thread limits for metric coase threads are listed. * is a blank for Z-PRO. PRAD-13