TM    9-2320-363-34-2 Table  1.  Drill  Sizes  for  Solid  Shank  Rivets Rivet Drill Diameter Drill  Size Diameter (In.) (In.) 1/16 #51 0.0670 3132 #41 0.0960 1/8 #30 0.1285 5/32 #21 0.1590 3/16 #10 0.1910 1/4 F 0.2570 5/16 P 0.3230 3/8 W 0.3860 Table  2.  Drill  Sizes  for  Blind  Rivets Nominal  Diameter  (In.) Oversize  Diameter  (In.) Rivet Drill Rivet Drill Diameter Size Minimum Maximum Diameter Size Minimum Maximum 1/8 #30 0.129 0.132 1/8 #27 0.143 0.146 5/32 #20 0.160 0.164 5/32 #16 0.176 0.180 3/16 #10 0.192 0.196 3/16 #5 0.205 0.209 NOTE While   drilling,   hold   drill   at   90-degree   angle   to   material   surface.   Avoid   letting drill   wobble,   making   oblong   holes. Avoid   excessive   pressure.   Let   drill   bit   do   cutting. Do   not   push   drill   thru   material. 3. PLACE DRILL IN CENTER MARK FOR NEW RIVET LOCATIONS OR ALINE DRILL WITH OLD HOLE WHEN  REPLACING  OLD  RIVETS  WITH  OVERSIZE  RIVETS.  WHEN  USING  POWER  DRILL,  GIVE BIT A FEW TURNS WITH FINGERS BEFORE STARTING MOTOR. THIS WILL HELP ENSURE DRILL DOES  NOT  JUMP  OUT  OPPOSITION  WHEN  MOTOR  IS  STARTED. 4. REMOVE ALL BURRS WITH METAL COUNTERSINK OR FILE. NOTE Make   sure   no   chips   are   trapped   between   sheets   of   metal. 5.  CLEAN  AWAY  ALL  DRILL  CHIPS. 6. APPLY SEALING COMPOUND TO HOLE AND SURROUNDING AREA. 22-17