Application Guide P M K N S H Carbon Steels AlloyList No.Low10101018Med.10351045HighSteelsDie10654140Steels4340Stainless SteelsCastIron30040017-4 PHAluminumNickelAlloyTitaniumHardened Steels60617075CastingInconel6Al4V(30 HRC)~35HRC35-4545-50HRCHRC50-70HRC Spiral Fluted Taps 13117 13127 13058 13158 295 296 13019 13119 290 299 297 298 107 143 13020 123 918 Spiral Pointed Taps 16515 16510 16555 16550 16535 good best WWW.OSGTOOL.COM Illustrated Index/Application Guide 345