Steel <35 HRC Steel >36–48 HRC PH and Ferritic Stainless Steel <35 HRC PH and Ferritic Stainless Steel >35 HRC Stainless Steel Grey Cast Iron Ductile Cast Iron Wrought Aluminium Cast Aluminium Copper, Copper Alloys Iron Based Cobalt Based Nickel Based Titanium Alloys Hardened Steels 49–55 HRC Hardened Steels 56–68 HRC High-Performance Taps Selection Guide P M K N S H 1, 2, 3, 4, 5, 9, 10,6, 711 12, 13.1 13.2 14.1, 14.2,14.3, 14.4 15, 16 17, 18,19, 20 21 22, 23,24, 25 26, 27, 28 31, 32 33, 34, 35 36 37 38.1, 38.2,40.1,40.2,41.1 39.1,41.2 recommended cutting page(s) parameters Spiral-Point and Left-Hand Spiral-Flute Taps (continued) Y4 Y85 Y5 Y85 Y6 Y85 Y7 Y85 Y8 Y85 Y9 Y85 Y10 Y85 Y11 Y86 Y14 Y86 Y17 Y86 Spiral-Flute Taps (continued) Y21 Y85 Y20 Y85 Y22 Y85 Y23 Y85 Y24 Y85 Y25 Y85 Y26 Y85 Y28 Y85 Y30 Y85 Y31 Y85 Y32 Y85 widia.com X3