550 NAS-Type Heavy-Duty Cobalt Straw Jobber-Length Drill Bit, 0.3281 in dia Cutting, 4.625 in OAL, 21/64 in

Chicago-Latrobe® 550 NAS-Type Heavy-Duty Cobalt Straw Jobber-Length Drill Bits

Description

  • Manufactured to NAS 907 Type J geometry aerospace specifications
  • Heavy-duty construction for drilling in tough, high-tensile, and work-hardening materials
  • Manufactured from premium cobalt high-speed steel
  • Straw finish adds lubricity and easily identifies cobalt drills
  • 135° P3 split point is self-centering for reduced thrust and easier penetration

Specification

Brand