ATI Countersink Integral Pilot 2 Flute Effective Blade Diameter #21 ATI445E421 1 pc

Catalog number: ATI445E421 Features: ●NATO stock number obtained. ●High concentricity achieved by machining. ●M2 high speed steel is used to achieve sharp cutting edge, high hardness and wear resistance. ●Used with microstop. Applications: ●For aircraft sheet metal processing (taper formation). ●For the aviation industry. Specifications: ●Number of teeth (pieces): 2 ●Shank diameter: 1/4-28 ●Cutter tip angle (°): 100 ●Effective cutting diameter (drill number): #21 ●Number of teeth: 2 ●Body diameter 1/2 inch ●For ATI441HS and other 1/4 -28 screw microstops ●NSN#5133-01-397-3092 Material/Finish: ●M2 high speed steel