BTU 2 tip type : Single Tube Drills with Outer 2 Start Thread connection and Brazed Tips, dia= 0.496 - 0.613 inch. Each item represents a diameter range. For a specific head diameter, an order form should be filled out.
  DesignationDCNDCXOALLFDCONMSHTubeTube DiaGICATGIREMgiic
  BTU-00942 .516-.535 0.51600.53501.6931.6500.3780.394ST00940.4334841044 0
  BTU-00951 .536-.555 0.53600.55501.6931.6460.4170.433ST00950.4724841045 0
  BTU-00952 .556-.574 0.55600.57401.6931.6460.4170.433ST00950.4724841046 0
  BTU-00961 .575-.594 0.57500.59401.6931.6420.4570.472ST00960.5124841047 0
  BTU-00962 .595-.614 0.59500.61401.6931.6420.4570.472ST00960.5124841048 0