PRAD SYSTEM PRAD system Solution tool PRAD system Specification corresponding with standard blanks(for Japanese market) Main size designation and specification ① ② ③ ④ ⑤ STI ⑥ STI metric unified whitworth sewing screw (metric) (unified) M2×0.4 №1-64UNC SM5/64-64 №1-72UNF M2×0.25 M2.2×0.45 №2-56UNC №2-64UNF M2.2×0.25 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 M2.6×0.45 №3-48UNC №3-56UNF M2.6×0.35 M3×0.5 №4-40UNC STI_M2×0.4 STI_№2-56UNC №4-48UNF STI_M2.2×0.45 M3×0.35 M3.5×0.6 №5-40UNC W1/8-40 SM1/8-40 STI_M2.5×0.45 №5-44UNF SM1/8-44 STI_M2.6×0.45 №6-32UNC №6-40UNF M3.5×0.35 M4×0.7 W5/32-32 SM9/64-40 STI_M3×0.5 STI_№4-40UNC STI_№5-40UNC M4×0.5 M4.5×0.75 №8-32UNC SM11/64-40 STI_M3.5×0.6 STI_№6-40UNF №8-36UNF M4.5×0.5 M5×0.8 №10-24UNC W3/16-24 SM3/16-24 STI_M4×0.7 STI_ № 6-32UNC №10-32UNF SM3/16-28 M5×0.75 SM3/16-32 M5×0.5 M6×1 №12-24UNC W7/32-24 SM15/64-28 STI_M4.5×0.75 STI_№8-32UNC №12-28UNF STI_M5×0.8 STI_№8-36UNF STI_№10-32UNF M6×0.75 SM7/32-32 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. PRAD-35