BT-EM (endmill holder) : Screw locking endmill holders with BT shank
RUN OUT-5                                           TAPER TOLERANCE                                     HARDNESS-60                                         ROUGHNESS                                          
  DesignationStockSSDCONWSBDBD_2LFLBLB_2CRKSCSPGICATGIREMgiic
  BT40EM10X45 N/ABT40 10.0035.00-45.0018.00-M16 With coolant hole 4529018 0
  BT40EM12X45 AvailableBT40 12.0042.00-45.0018.00-M16 With coolant hole 4529019 0
  BT40EM14X45 N/ABT40 14.0044.00-45.0018.00-M16 With coolant hole 4511678 0
  BT40EM16X45 N/ABT40 16.0048.00-45.0018.00-M16 With coolant hole 4529020 0
  BT40EM20X45 N/ABT40 20.0052.00-45.0018.00-M16 With coolant hole 4529021 0
  BT40EM25X45 N/ABT40 25.0063.00-45.000.00-M16 With coolant hole 4529022 0
  BT30EM6X50 N/ABT30 6.0025.00-50.0028.00-M12 With coolant hole 4511443 0
  BT30EM8X60 N/ABT30 8.0028.00-60.0038.00-M12 With coolant hole 4511444 0
  BT30EM10X60 N/ABT30 10.0035.00-60.0038.00-M12 With coolant hole 4511445 0
  BT30EM14X50 N/ABT30 14.0044.00-60.0038.00-M12 With coolant hole 4511536 0
  BT40EM6X50 N/ABT40 6.0025.00-50.0023.00-M16 With coolant hole 4529025 0
  BT40EM8X50 AvailableBT40 8.0028.00-50.0023.00-M16 With coolant hole 4529026 0
  BT40EM10X65 N/ABT40 10.0035.00-65.0038.00-M16 With coolant hole 4529001 0
  BT40EM12X65 AvailableBT40 12.0042.00-65.0038.00-M16 With coolant hole 4529002 0
  BT40EM14X65 N/ABT40 14.0044.00-65.0038.00-M16 With coolant hole 4511541 0
  BT40EM16X65 N/ABT40 16.0048.00-65.0038.00-M16 With coolant hole 4529003 0
  BT40EM18X65 AvailableBT40 18.0050.00-65.0038.00-M16 With coolant hole 4511544 0
  BT40EM20X75 N/ABT40 20.0052.00-75.0048.00-M16 With coolant hole 4529004 0
  BT40EM25X105 N/ABT40 25.0065.0061.00105.0078.0068.00M16 With coolant hole 4529005 0
  BT40EM32X110 AvailableBT40 32.0071.0061.00110.0083.0073.00M16 With coolant hole 4529006 0
  BT50EM6X70 N/ABT50 6.0025.00-70.0032.00-M24 With coolant hole 4529036 0
  BT50EM8X70 N/ABT50 8.0028.00-70.0032.00-M24 With coolant hole 4529037 0
  BT50EM10X70 N/ABT50 10.0035.00-70.0032.00-M24 With coolant hole 4529038 0
  BT50EM12X100 N/ABT50 12.0042.00-100.0062.00-M24 With coolant hole 4529039 0
  BT50EM14X100 N/ABT50 14.0044.00-100.0062.00-M24 With coolant hole 4511450 0
  BT50EM16X100 N/ABT50 16.0048.00-100.0062.00-M24 With coolant hole 4529007 0
  BT50EM20X100 N/ABT50 20.0052.00-100.0062.00-M24 With coolant hole 4529008 0
  BT50EM25X115 AvailableBT50 25.0065.00-115.0077.00-M24 With coolant hole 4529009 0
  BT50EM32X115 AvailableBT50 32.0072.00-115.0077.00-M24 With coolant hole 4529010 0
  BT50EM40X115 N/ABT50 40.0090.00-115.0077.00-M24 With coolant hole 4529040 0
  BT50EM50X125 N/ABT50 50.0098.00-125.0087.00-M24 With coolant hole 4529041 0

Add B for coolant through the flange.