31/64″ Six Inch Overall Length, Aircraft Extension Drill Bit, High Speed Steel

Description

31/64″ Cut Diameter. Decimal Equivalent- .4844 Flute Length-4-3/8″ 6″ Overall Length, High Speed Steel, Aircraft Extension Drill Bit. These Drills Are Manufactured To National Aerospace Standard 907. They Have A 135 Degree Split Point That Is Self Centering Which Reduces Thrust. These Drills Are Ideal For Drilling In Mild Steel Where Extra Lingth For Reach Is Required. They Have A Black Oxide Surface Treatment That Is Avrasion Resistant, Which Also Reduces Chip Welding And Improves Chip Flow. Sizes Smaller Than #52 And 1/16″ Have A Standard 118 Degree Point.