Threaded Shank Adapter Drills

THREADED SHANK DRILLS - Pan American Tool's type “D” threaded shank adapter drills are made from cobalt high speed steel and are manufactured to NAS 965 type “D” specifications with 135-degree heavy-duty split points and surface treated for drilling hard, tough, high-tensile-strength materials. When drilling low-tensile-strength materials, the type “D” cobalt aircraft drill will have a significantly greater tool life than the NAS 965 type “B” high-speed steel adapter drill, resulting in a much lower cost per drill.