Threaded Shank Drill Bit Set, Combo

Six aircraft quality precision twist drill bits for the most popular rivet and machine screw diameters: 3/32″ long; 1/8″ long, short and stub; 5/32″ short; & 3/16″ short. All TightFit® threaded shank drill bits are black oxided to add lubricity, prevent corrosion while enhancing appearance.

The drill bits comply with National Aerospace Standards. The Standard provides the following description, “A special short flute, heavy duty drill designed for drilling the hard, high strength alloys used in aircraft manufacturing.” The drill bits are made from M2 or M7 tool steel with self-centering, 135 degree, P3 split points and a Rockwell C scale hardness of 63.5 to 66. They are manufactured as right-hand tools with 5/16″ hex wrench flats and 1/4-28 UNF-2A threads. TightFit® threaded shank drill bits are concentric, self-tightening, non-slipping, long life tools designed for work in limited space situations. You save $3.74 over buying the drills separately.

TightFit® threaded shank drill bits WORK EQUALLY WELL IN METAL, WOOD OR PLASTIC.