G4998 Screw Machine Drill Standard List Number 157 Number of Pieces 1 General Purpose Grade High Speed Steel Bright Finish Conventional Point Drill Point (Deg.) 118 Letter Size O Decimal Equivalent 0.3160 Flute Length (In.) 1-11/16 Overall Length (In.) 2-15/16 Shank Dia (In.) 0.3160 For Alloy And Carbon Steels And Cast Iron