Selection Chart Intro Z-PRO GP General Purpose GGST GGST CH GGST CH E(1.5P) HT HT LH PF LH NPT NPTF HSS-E COATING HSS-E COATING HSS-E COATING HSS-E HSS-E HSS-E HSS-E HSS-E OX SP SL PO ST ROLL DIN DIN DIN DIN JIS ANSI JIS JIS ANSI ANSI M 271 273 275 277 295 321 MF 271 273 275 277 299 322 UNC/UNF 277 312 341 327 UNS, 8, 12, 20, 32UN 316 CARBIDE UNEF 317 G (BSP) 271 278 329 Rp (BSPP) Rc (BSPT) NPT 346 LONG NPTF 347 NPSC, NPSM, NPSF BSW 318 328 EG(STI), M, MF, UNC/UNF Pg HAND Tr TAPS S miniature Special threads Vc (m/min) P1 I 5÷10 I 5÷10 I 5÷10 H ≤5 H ≤5 EG (STI) P2 H 5÷10 H 5÷10 H 5÷10 H ≤5 H ≤5 P3 I 5÷10 I 5÷10 I 5÷10 I ≤5 I ≤5 P4 I 5÷10 I 5÷10 I 5÷10 I ≤5 I ≤5 P5 SPECIAL P6 THREADS, P7 GAUGES P8 M1 M2 THREAD M3 MILLS K1 H 5÷20 H 10÷30 H 10÷30 I 5÷10 I 5÷10 I 5÷10 I ≤5 K2 H 5÷20 H 10÷30 H 10÷30 I 5÷10 I 5÷10 I 5÷10 I ≤5 K3 H ≤10 H ≤15 H ≤15 I 5÷10 I 5÷10 K4 ª10 ≤10 ª10 ≤10 ª10 ≤10 N1 DIES N2 I 10÷20 I 10÷30 I 10÷30 I 5÷10 I 5÷10 I 5÷10 I ≤5 N3 I 5÷10 I 5÷10 I 5÷10 N4 H 10÷20 H 10÷30 H 10÷30 I 5÷10 I 5÷10 I 5÷10 I ≤5 N5 CENTER S1 (<25 HRC) S2 (<35 HRC) DRILLS S3 (35 ÷ 45 HRC) S5 H (45 ÷ 55 HRC) Technical H (55 ÷ 63 HRC) info H 1st choice I suitable 266