Thread Milling Tools UN INTERNAL ANSI B1.1-1982 UN NUT 1/4P 60 1/8P UN SCREW LEFT HAND CUTTING, CNC CODE: M04 THREAD LENGTH – UP TO 3D D = NOMINAL THREAD SIZE THREAD SIZE PITCH ORDERING L L1 D1 D2 NO. OF TPI CODE FLUTES COARSE UNC FINE UNF 1 1-72 72 TMD06014L5 72UN 57 5.8 6 1.44 3 2 5-40 6-40 40 TMD06024L9 40UN 57 9.8 6 2.46 3 3 8-32 10-32 32 TMD06032L12 32UN 57 12.7 6 3.22 3 4 1/4"-28 28 TMD06052L19 28UN 57 19.3 6 5.20 3 5 5/16"-24 24 TMD08066L24 24UN 63 24.2 8 6.65 3 6 1/4"-20 7/16"-20 20 TMD06048L19 20UN 57 19.4 6 4.85 3 7 7/16"-20 20 TMD08079L24 20UN 63 24.0 8 7.95 3 8 5/8"-18 18 TMD12119L34 18UN 84 34.0 12 11.90 4 9 3/8"-16 16 TMD08069L21 16UN 63 21.0 8 6.90 3 10 11 MINIATURE TOOLS FOR HARD MATERIAL – UP TO 62 HRc 12 13 14 15 16 17 18 19 20 21 22 23 24 22