17039 Type 240-DB Jobber Length Hardened and Ground Bright Finish Drill Blank (6 pack) 2.834" OD Bost-Bronz® has a self-contained oil

Bost-Bronz® has a self-contained oil supply (approximately 20% by volume) which provides a uniform protective film over the entire bearing surface

but works best with the CEG® style tip

Body Material Aluminum

A simple "Tee" configuration with two couplers and a single connector

17039 Type 240-DB Jobber Length Hardened and Ground Bright Finish Drill Blank (6 pack) 2.834" OD Bost-Bronz® has a self-contained oilFully hardened drill blanks typically used as hole size and bushing gauges. May also be used as guide pins for die sets. Tolerances: +. 0000 . 0005 thru 1 4" +. 0000 . 0007 over 1 4" Click Here for product catalog Proudly Manufactured in the U. S. A