BT - MORSE TAPER ADAPTER - METRIC Taper SizeBT-30, 40 and 50 A ➚ A .005 AT3 Taper 58-60 HRc N5 L L1 D G K Designation K L L1 D G BT30 MT1X 45 MT1 45 23 25 M12 BT30 MT2X 60 MT2 60 38 32 M12 BT40 MT1X 45 MT1 45 18 25 M16 BT40 MT1X120 MT1 120 93 25 M16 BT40 MT2X 60 MT2 60 33 32 M16 BT40 MT2X120 MT2 120 93 32 M16 BT40 MT3X 75 MT3 75 48 40 M16 BT40 MT3X139 MT3 139 112 40 M16 BT40 MT4X 95 MT4 95 68 50 M16 BT50 MT1X 45 MT1 45 7 25 M24 BT50 MT1X120 MT1 120 82 25 M24 BT50 MT1X180 MT1 180 142 25 M24 BT50 MT2X 45 MT2 45 7 32 M24 BT50 MT2X135 MT2 135 97 32 M24 BT50 MT2X180 MT2 180 142 32 M24 BT50 MT3X 45 MT3 45 7 40 M24 BT50 MT3X150 MT3 150 112 40 M24 BT50 MT3X180 MT3 180 142 40 M24 BT50 MT4X 75 MT4 75 37 50 M24 BT50 MT4X180 MT4 180 142 50 M24 BT50 MT5X105 MT5 105 67 70 M24 812