Special Threads, Gauges Intro HT CTG GP General Purpose Series SP Straight Fluted Taps for Metal Thick-Walled Conduit Threads FEATURES SL HSS-E 5P For thick steel conduit threads.Thread angle is 55°. THCHT Thread symbol is CTG. PO Recommended Tapping Speeds Depending On Materials ISO Vc (m/min) P1 ≤10 H P2 ≤10 H ST H 1st choice I suitable ROLL JIS-HT CTG TYPE: ST_035 CARBIDE K DCON THL LK K LONG LS LF HAND TAPS CTG TCTR Ø Hole Ø(tolerance)(mm)(mm)CodeTHCHT(chamfer)LF LT THL LU LS DCON K LK(mm)(mm)(mm)(mm)(mm)(mm)(mm)(mm)NOFType Stock JIS EG (STI) CTG16-14 - 19.3 19.4 TYCG160HEB5 5P 115 - 25 - 55 17 13 16 4 035 f CTG22-14 - 24.8 24.88 TYCG220HEB5 5P 130 - 26 - 60 20 15 18 4 035 f CTG28-11 - 31.2 31.21 TYCG280HEB5 5P 155 - 31 - 71 28 21 24 4 035 f SPECIALTHREADS,GAUGESCTG36-11CTG42-11 - 39.8 39.87 TYCG360HEB5 5P 180 - 33 - 83 35 26 30 4 035 f-45.745.77TYCG420HEB55P185-34-853829324035f JIS THREAD MILLS DIES CENTER DRILLS Technical info 592