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) M3.5×0.6 SM1/8-40 SM1/8-44 №5-40UNC W1/8-40 №5-44UNF №6-32UNC №6-40UNF STI_M2.5×0.45 STI_M2.6×0.45 M3.5×0.35 M3.5×0.6 M3.5×0.35 M4×0.7 W5/32-32 SM9/64-40 STI_№4-40UNC STI_№5-40UNC M4×0.75 M4×0.5 STI_M3×0.5 M4×0.7 M4×0.5 M4.5×0.75 SM11/64-40 STI_№6-40UNF №8-32UNC №8-36UNF M4.5×0.5 STI_M3.5×0.6 M4.5×0.75 M4.5×0.5 M5×0.8 W3/16-24 SM3/16-24 STI_M4×0.7 STI_№6-32UNC SM3/16-28 M5×0.75 SM3/16-32 M5×0.9 SM3/16-40 №10-24UNC №10-32UNF M5×0.5 M5×0.8 M5×0.5 M5.5×0.5 M5.5×0.5 M6×1 W7/32-24 SM15/64-28 STI_M4.5×0.75 STI_№8-32UNC SM7/32-32 STI_M5×0.8 STI_№10-24UNC M6×0.75 STI_№10-32UNF №12-24UNC №12-28UNF №12-32UNEF STI_№8-36UNF M6×0.5 M6×1 M6×0.75 M6×0.5 * 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-15