PICCO-Whitworth-Thread :  Mini-carbide bars for Whitworth profile internal threading. Dmin 4 mm.  
 Right-hand shown
 
Threading (Int.)  
  Designation
d		 TPI
max		 TPI
min
te
w
Y
f
a
l2
l1		 D
min
  Grade
  PICCO R 005.5548-15  5.00  48  24  0.40  0.06  0.45  1.9  4.40  14.0  30.00  4.80 IC228
  PICCO R 006.5548-15  6.00  24  16  0.81  0.06  0.45  2.3  5.30  14.0  30.00  6.00 IC228
  PICCO R 006.5524-15  6.00  48  24  0.40  0.12  0.75  2.3  5.30  14.0  30.00  6.00 IC228
  PICCO R 007.5524-15  7.00  24  16  0.81  0.12  0.75  2.8  6.30  14.0  30.00  7.00 IC228

All mini-bars have sharp corners
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