SHANK
OVERALL LENGTH
  MMX
DIA. 2 1/2" 2 3/4"  3" 3 1/4" 3 1/2" ROUND HEAD
 
1222 1323 2030 2131 2232
MIN.
 
 
 1/4 25-1222 25-1323 25-2030 25-2131 25-2232 0.120  3/8   3/16
  5/16 31-1222 31-1323 31-2030 31-2131 31-2232 0.180   7/16   3/16
 3/8 37-1222 37-1323 37-2030 37-2131 37-2232 0.218  1/2   3/16
  7/16 43-1222 43-1323 43-2030 43-2131 43-2232 0.250   9/16   3/16
 1/2 50-1222 50-1323 50-2030 50-2131 50-2232 0.312  5/8   3/16