Selection Chart Intro MS Material Specific ZELX SS NPT ZELX SS NPTF SP-VA TiCN SU2-SP AL+SP/AL-SP AL-SP 1.5P ZELX AL SP ZEN-B HSS-E OX HSS-E OX HSS-E COATING HSS-E OX HSS-E NI HSS-E NI HSS-E NI HSS-P OX SP SL PO ST ROLL ANSI ANSI DIN DIN DIN JIS JIS ANSI DIN M 141 143 145 173 175 146 MF 173 175 147 UNC/UNF 187 147 UNS, 8, 12, 20, 32UN CARBIDE UNEF G (BSP) 143 Rp (BSPP) Rc (BSPT) NPT 184 LONG NPTF 185 NPSC, NPSM, NPSF BSW EG(STI) M, MF, UNC/UNF HAND Pg TAPS TrS miniature Special threads Vc (m/min) EG (STI) P1P2 H ≤5 H ≤5 H ≤15 P3 H ≤5 H ≤5 H ≤15 H 5÷15 P4 I ≤5 I ≤5 I ≤15 H 5÷15 SPECIALTHREADS,GAUGES P5P6P7P8 H ≤5 H ≤5 H ≤15 I 5÷10H5÷15H4÷8 M1 H ≤5 H ≤5 H ≤15 I 5÷15 H 5÷15 M2 H ≤5 H ≤5 H 5÷15 H 5÷15 THREAD M3 H 5÷12 H 4÷8 MILLS K1 K2 K3 K4 DIES N1N2 H 10÷25 H 10÷25 H 10÷25H10÷25H10÷25H10÷25 N3 H 10÷25 H 10÷25 H 10÷25 N4 H 10÷25 H 10÷25 H 10÷25 N5 CENTER S1 (<25 HRC) I 3÷7 H 5÷10 DRILLS S2 (<35 HRC) H 5÷10 S3 (35 ÷ 45 HRC) S5 H (45 ÷ 55 HRC) Technical H (55 ÷ 63 HRC) info H 1st choice I suitable 78