BTA DRILL BRAZED - BTA-SERIES DOUBLE TUBE SYSTEM - OUTER FOUR START THREAD Diameter 0.725 - 1.559 d2 d1 ØD l1 L Dimension Tube Grade Designation D L l1 d1 d2 Outer tube Inner tube Diameter TB103 TB203 TB253 BTA x.xxx DE4-18 0.725 - 0.756 1.97 0.85 0.551 0.630 BTDO018 BTDI012 0.709 BTA x.xxx DE4-18 0.756 - 0.787 1.97 0.85 0.551 0.630 BTDO018 BTDI012 0.709 BTA x.xxx DE4-19.5 0.788 - 0.823 2.20 0.85 0.630 0.709 BTDO019.5 BTDI014 0.768 BTA x.xxx DE4-19.5 0.823 - 0.858 2.20 0.85 0.630 0.709 BTDO019.5 BTDI014 0.768 BTA x.xxx DE4-21.5 0.859 - 0.902 2.20 0.85 0.689 0.768 BTDO021.5 BTDI015 0.846 BTA x.xxx DE4-21.5 0.902 - 0.949 2.20 0.85 0.689 0.768 BTDO021.5 BTDI015 0.846 BTA x.xxx DE4-23.5 0.949 - 0.992 2.26 0.85 0.748 0.827 BTDO023.5 BTDI016 0.925 BTA x.xxx DE4-23.5 0.993 - 1.039 2.26 0.85 0.748 0.827 BTDO023.5 BTDI016 0.925 BTA x.xxx DE4-26 1.040 - 1.083 2.38 0.96 0.827 0.925 BTDO026 BTDI018 1.024 BTA x.xxx DE4-26 1.083 - 1.130 2.38 0.96 0.827 0.925 BTDO026 BTDI018 1.024 BTA x.xxx DE4-28 1.130 - 1.173 2.50 0.96 0.906 1.004 BTDO028 BTDI020 1.102 BTA x.xxx DE4-28 1.174 - 1.220 2.50 0.96 0.906 1.004 BTDO028 BTDI020 1.102 BTA x.xxx DE4-30.5 1.221 - 1.264 2.50 0.96 1.004 1.102 BTDO030.5 BTDI022 1.201 BTA x.xxx DE4-30.5 1.264 - 1.311 2.50 0.96 1.004 1.102 BTDO030.5 BTDI022 1.201 BTA x.xxx DE4-33 1.311 - 1.370 2.78 1.20 1.063 1.181 BTDO033.0 BTDI024 1.299 BTA x.xxx DE4-33 1.370 - 1.425 2.78 1.20 1.063 1.181 BTDO033.0 BTDI024 1.299 BTA x.xxx DE4-35.5 1.426 - 1.469 2.89 1.20 1.181 1.299 BTDO035.5 BTDI026 1.398 BTA x.xxx DE4-35.5 1.469 - 1.512 2.89 1.20 1.181 1.299 BTDO035.5 BTDI026 1.398 BTA x.xxx DE4-35.5 1.512 - 1.559 2.89 1.20 1.181 1.299 BTDO035.5 BTDI026 1.398 Operating guidelines on page 714. = on request 635