Screw Machine Drill Bit, Standard, List Number 159, Number of Pieces 1, Heavy Duty Grade, High Speed Steel, Black Oxide Finish, Split Point, Drill Point (Deg.) 135, Fractional Size (In.) 25/64, Decimal Equivalent 0.3906, Flute Length (In.) 1-7/8, Overall Length (In.) 3-1/4, Shank Dia. (In.) 25/64, 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