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Adapter-Threaded Shank

Type "D" adapter drills are made from M42 8% cobalt high speed steel and are manufactured to NAS 965 Type "D" specifications with 135ยบ heavy duty split point and surface treated for drilling hard, tough, high tensile strength materials. When drilling low tensile strength materials, the Type "D" cobalt drill will have significantly greater tool life than the NAS 965 Type "B", high speed steel adapter drill, resulting in a much lower cost per drill.
Threaded Shank
Drill Adapter, Threader Shank, Wire Gauge
Drill Adapter, Threader Shank, Fractional
Drill Adapter, Threader Shank, Letter
Special, Extra Long
Drills, Adapter-Threaded Shank, Special, Extra Long
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