Application Guide P M K N S H Carbon Steels AlloyList No.Low10101018Med.10351045HighSteelsDie10654140Steels4340Stainless SteelsCastIron30040017-4 PHAluminumNickelAlloyTitaniumHardened Steels60617075CastingInconel6Al4V(30 HRC)~35HRC35-4545-50HRCHRC50-70HRC Straight Fluted Taps 11053 11054 11055 10056 11056 10057 11057 240 241 101C 141C 101 101H 102 102H 103 104 101N 141 121 916 S110 114 good best WWW.OSGTOOL.COM Illustrated Index/Application Guide 353