Selection Chart Intro Thread Mills PRML PRML TI HF COATING HF COATING SP CARBIDE CARBIDE SL PO ST ROLL YMW YMW M 597 599 MF 597 599 UNC/UNF 597 599 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 HAND Pg TAPS TrS miniature Special threads Vc (m/min) EG (STI) P1 HP2H P3 H P4 H SPECIALTHREADS,GAUGES P5P6P7P8 HH H M1 H M2 H THREAD M3 H MILLS K1 H K2 H K3 K4 DIES N1N2 N3 N4 N5 CENTER S1 (<25 HRC) DRILLS S2 (<35 HRC) S3 (35 ÷ 45 HRC) S5 H H (45 ÷ 55 HRC) Technical H (55 ÷ 63 HRC) info H 1st choice I suitable 594