TM  55-1520-240-23-6 7-5 REPAIR  PERMASWAGE  PLUMBING (Continued) 7-5 DEBURR  TUBE Do  not  place  fitting  over  tube  end until  tube  end  is properly  deburred. Damage  to  the  fitting  may  result. 10. Inspect  and  assemble  correct deburring  tool and stem  subassembly. NO  BREAK  - WORK  HARDER NO  BREAK  - WORK  HARDER DEBURRING  TOOL TUBE OD  INCH TUBE  WALL THICKNESS INCH STEM SUBASSEMBLY REQUIRED 1/4 0.016  -  0.028 D9851-13-04 0.028  -  0.050 D9851-13-03 D9851 1/16 0.016  -  0.035 D9851-13-05 3/8 0.016  -  0.035 D9851-13-06 0.035  -  0.058 D9851-13-07 1/2 0.016  -  0.042 D9850-13-08 D9850 0.042  -  0.065 D9850-13-09 5/8 0.016  -  0.058 D9850-13-10 3/4 0.016  -  0.065 D9850-13-12 1 0.020  -  0.083 D9849-13-06 D9849 1-1/4 0.024  -  0.065 D9849-13-20 0.065  -  0.109 D9849-13-21 1-1/2 0.028  -  0.083 D9849-13-24 7-32