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Brown Aviation Tool Supply, LLC 2536 SE 15th Street Oklahoma City, OK 73129 Toll Free 800-587-3883 (US & Canada) Local 405-688-6888
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Our Threaded Shank Adapter Drills are manufactured to NAS 965 Type D Standards with 135 Degree Split Points. Cobalt Drills are for drilling hard, tough, high tensile strength materials and has a significantly longer tool life than regular High Speed Steel. Industry standard 1/4 - 28 threads. Our Threaded Shank Drills are Made in the USA!
#21 (.1590) Stub Length 9/16" long Order Part # 31159