
Selection Chart Intro GP General Purpose MS Material Specific SP STI PO STI HT STI N-RS STI AL-SP STI AL-PO STI AL-HT STI ZELX NI SP STI HSS-E NI HSS-E HSS-E HSS-E NI HSS-E NI HSS-E HSS-E HSS-P NX SP SL PO ST ROLL ANSI ANSI ANSI JIS JIS JIS JIS ANSI M MF UNC/UNF UNS, 8, 12, 20, 32UN CARBIDE UNEF G (BSP) Rp (BSPP) Rc (BSPT) NPT LONG NPTF NPSC, NPSM, NPSF BSW EG(STI), M, MF, UNC/UNF 531 535 539 529 521 523 525 532 Pg HAND Tr TAPS S miniature Special threads Vc (m/min) P1 I 5÷10 I 5÷10 I 5÷10 I 5÷15 EG (STI) P2 I 5÷10 I 5÷10 I 5÷10 I 5÷15 P3 I 5÷10 I 5÷10 I 5÷10 H 5÷15 P4 H 5÷15 P5 I 5÷10 SPECIAL P6 THREADS, P7 H 5÷15 GAUGES P8 H 4÷8 M1 H 5÷15 M2 H 5÷15 THREAD M3 H 4÷8 MILLS K1 K2 K3 K4 N1 H 5÷15 H 5÷15 H 5÷15 H 5÷15 H 10÷25 H 5÷15 H 5÷15 DIES N2 H 5÷15 H 5÷15 H 5÷15 H 5÷15 H 10÷25 H 5÷15 H 5÷15 N3 H 5÷15 H 5÷15 H 5÷10 H 5÷15 H 10÷25 H 5÷15 I 5÷10 N4 H 5÷15 H 5÷15 H 5÷10 H 10÷25 H 5÷15 H 5÷10 N5 CENTER S1 (<25 HRC) H 5÷10 S2 (<35 HRC) H DRILLS S3 (35 ÷ 45 HRC) 5÷10 S5 H (45 ÷ 55 HRC) Technical H (55 ÷ 63 HRC) info H 1st choice I suitable 518