Cobalt Threaded Shank Drills – Stubby Series

• Type “D” adapter drills are made from cobalt high speed steel and are manufactured to NAS 965 Type “D” specifications with 135° 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 drill will have a significantly greater tool life than the NAS 954 Type “B”, high speed steel adapter drill, resulting in a much lower cost per drill.
• Constructed from Industrial-Grade NAS Steel
• Able to screw into a threaded adapter on a handheld drill to enable drilling in tight areas where standard bits that install in a chuck can’t fit
• Commonly used for angle and offset drilling
• Split point penetrates on contact and prevents “walking” of the bit
• Built to NAS 965
• Overall Length 9/16″

Material Application

Low and Medium Carbon Steels, Alloy Steels, Stainless Steels and Strength Alloys.