The rod pin threads are 
electric induction hardened to ensure long life and minimize rod box thread galling, extending drill rod thread-life and joint performance.

Identification groove supplied on ARQ™TK and BRQ™TK subs.

The rod pin threads are electric induction case hardened to ensure long life and minimize rod box thread galling, extending drill rod thread life and joint performance. 

Blank end adapter subs enable you to create adapter subs according to your unique requirements. They are supplied as rod pin or rod box to either solid blank bar end or tubing blank end. Solid bar end subs are for use with hoist plugs and water swivels only. 

The Water Saver Sub includes a check valve feature that can be used to increase production (extended core barrels only) by eliminating the need to refill the rod string in up-angled or inclined holes.