Screw Machine Drill, Aircraft, List Number 159, Number of Pieces 1, Heavy Duty Grade, High Speed Steel, Black Oxide Finish, Split Point, Drill Point (Deg.) 135, Wire Size #21, Decimal Equivalent 0.1590, Flute Length (In.) 1-1/16, Overall Length (In.) 2-1/8, Shank Dia. (In.) 0.1590, For Alloy, Carbon And Tool Steels And Cast Iron, Meets/Exceeds National Aerospace Standards (NAS) 907, Type C
Heavy-Duty Screw Machine Length HSS Drills, 135 - Short length provides rigidity, minimizing deflection. Chicago-Latrobe List# 159 meets/exceeds National Aerospace Standards (NAS) 907, Type C.
- Split point Black oxide finish