NDS Drilling Supply

A. Outside Diameter of neck.

B. Distance across the flats.

C. Thread name for box going to drill rod.

D. Distance from drill rod box shoulder to the start of the flat.

E. Length of the neck.

F. Stabilizer overall length.

G. Height of the rib.

H.  Distance from shoulder of box to the start of the rib.

I. Length of the flat.

J. Thread name for box going to drill bit.

K. Outside Diameter of the stabilizer.