Page 164 - Demo

162 ISCAR PRE-THREAD DRILLING WITH CHAMFERING Inch ThreadsDrill Designation Dia. RangeUNF Thread Head Dia.UNC Thread Head Dia.UNC Helicoil Thread Head Dia.BSW Thread Head Dia.BSF Thread Head Dia.DCT 085-026-14B-M10 8.30-8.99 UNF3/8-24 8.5 UNC5/16-18 8.4DCT 102-030-14B-M12 10.0-10.99 UNC1/2-13 10.8 BSW1/2-12 10.5 BSF1/2-16 10.99DCT 120-035-16B-M14 12.0-12.99 UNC9/16-12 12.3 BSF9/16-16 12.50DCT 140-039-18B-M16 14.0-14.99 UNF5/8-18 14.5DCT 175-042-20B-M20 17.3-17.99 UNF3/4-16 17.5Inch ThreadsDrill DesignationDia. RangeNPT Thread Head Dia.BSF ThreadHead Dia.BSP Thread Head Dia.UNEF Thread Head Dia.UNJF Helicoil Thread Head Dia.DCT 085-026-14B-M10 8.30-8.99 NPT1/8-27 8.5 G1/8-28 8.8 UNEF3/8-32 8.7 UNJF3/8-24 8.6DCT 102-030-14B-M12 10.0-10.99 BSF1/2-16 10.99DCT 120-035-16B-M14 12.0-12.99 BSF9/16-16 12.50DCT 140-039-18B-M16 14.0-14.99 NPT3/8-18 14.5 UNEF5/8-24 14.8 UNJF5/8-18 14.5DCT 175-042-20B-M20 17.3-17.99 NPT1/2-14 17.5 UNEF3/4-20 17.8