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-Flute Taps (continued)       Y33 Y85   Y34 Y85           Y35 Y86           Y38 Y86           Y41 Y86           Y42 Y86 Straight-Flute Taps (continued)  Y46 Y84   Y47 Y84   Y48 Y84  Y49 Y84  Y50 Y84   Y51 Y84     Y52 Y85     Y53 Y85     Y54 Y85     Y55 Y85  Y56 Y85 Form Taps (continued)   Y60 Y84   Y61 Y84    Y62 Y85    Y63 Y85 widia.com X5