Insert #
Standard Nib
Maximum
Recommended
Hole Size
Standard Casing
Diameter
Height
Diameter
Height

  R-2 0.325 0.330 0.128 1" or 1/2" .9/16

  R-5 0.625 0.600 0.280 1 1/2 7/8

  R-6 0.710 0.700 0.350 2 1 1/8

  R-8 1.000 0.820 0.516 3 1 3/4

  R-9 1.187 0.820 0.687 3 1 3/4

  R-10 1.500 1.000 0.875 3 or 4 2

  R-11 1.830 1.250 1.250 4 2 1/4

  R-12 2.185 1.375 1.600 4 2 3/8

  R-14 2.560 1.375 1.750 6 or 7 2 1/2

  R-15 3.000 1.375 2.250 6 or 7 2 1/2

  R-16 3.500 1.375 2.500 6 or 7 2 1/2

  R-17 4.000 1.500 3.000 9 3

  R-18 5.500 2.125 3.750 11 4 1/2

  R-19 6.500 2.125 4.500 13 4 1/2