PRAD system Solution tool PRAD system Main size designation and Overall length of standard type and long type, and Applicable class specification corresponding Materials Max. Length of thread TYPE standard type: L ℓ ℓn ℓs Ds K ℓk length Cutting Forming (reference) 160 37 - 82 20 15 18 37 ~~P5 ~~G12 h ○ 46 g 135 - 62 23 17 20 46 ~P5 ~G13 ○ 20 g-1 15 180 44 - 92 23 17 20 44 ~P5 ~G12 h ○ 46 g 135 - 62 23 17 20 46 ~P5 ~G13 PRAD SYSTEM ○ 21 g-1 16 180 44 - 92 23 17 20 44 ~P5 ~G12 h ○ 46 g 145 - 67 24 19 22 46 ~P5 ~G13 ○ 21 g-1 16 180 44 - 92 24 19 22 44 ~P5 ~G13 h ○ 145 46 g - 67 25 19 22 46 ~P5 ~G13 ○ 21 g-1 180 46 - 92 25 19 22 46 ~P5 ~G13 h ○ 52 g 155 - 71 28 21 24 52 ~P6 ~G14 ○ 26 g-1 200 52 - 102 28 21 24 52 ~P6 ~G14 h ○ PRAD-26