Selection Chart Intro HT Hand taps 6110 HT DIN352 6412 HT DIN5157 ISP IPO IHT HSS-E HSS-E HSS-E HSS-E HSS-E OX HSS-E OX HSS-E OX SP SL PO ST ROLL DIN DIN DIN DIN JIS JIS JIS M 509 511 514 515 516 MF UNC/UNF UNS, 8, 12, 20, 32UN CARBIDE UNEF G (BSP) 512 513 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 H <5 HH<5H H <5 H ≤5 H ≤5 H ≤5H<5I≤5I≤5I≤5 P3 H H <5 H H <5 P4 I I <5 I I <5 SPECIALTHREADS,GAUGES P5P6P7P8 M1 M2 THREAD M3 MILLS K1 I I <5 I I <5 K2 I I <5 I I <5 K3 I <5 I <5 K4 DIES N1 I I <5 I I <5N2II<5II<5 N3 I I <5 I I <5 N4 I I <5 I I <5 N5 CENTER S1 (<25 HRC) DRILLS S2 (<35 HRC) S3 (35 ÷ 45 HRC) S5 H (45 ÷ 55 HRC) Technical H (55 ÷ 63 HRC) info H 1st choice I suitable 506