PRECISION TWIST DRILL 059220 T 135° 12" OAL, High Speed Steel Extra Long Drill
PRECISION TWIST High Speed Steel Aircraft Extension Drills - Size : T   Flute Length : 3-1/2   Drill Point Angle: 135°   Flute Shape: Normal spiral - helical flutes   Overall Length : 12

PRECISION TWIST DRILL 059220 T 135° 12" OAL, High Speed Steel Extra Long Drill

Item #: 01-316-420
Size Type: Letter
Size: T
Overall Length: 12"

Master Catalog Listing

Only sold in increments of 3.

Need a different size, length or brand?

View Product Group Page
Access hard-to-reach holes


  • For drilling normal steels, cast iron, and a variety of other ferrous and non-ferrous metals and alloys.
  • Used with hand held manual drills and either portable or stationary machines.


  • Right hand (clockwise rotation) cutting direction.
  • Standard 2 flute design, normal spiral - helical flutes.
  • Straight shanks correspond to the drill diameter.

Technical Data

  • Manufactured from high speed steel to NAS 907 Type B specifications.
  • Cylindrically ground, point angle ground to 118° included angle.
  • Black finish.
Product Specifications
Size Type Letter
Size T
Overall Length 12"
Drill Point Angle 135°
Tool Material High Speed Steel
Finish Coating Black Oxide
Drill Grade General Purpose
Drill Type Aircraft Extension
First Choice For: Steel
Flute Length 3-1/2"
Flute Shape Normal Spiral - Helical
Hardness 58 to 60 RC
Manufacturing Method Cylindrically ground
Model # 059220
No. of Flutes 2
Point Sharpening Type Split Point
Prop. 65 Yes
Series SERIES 502-12
Shank Style Straight Shank
Type High Speed Steel Aircraft Extension Drills
Weight 0.006 lbs.
Workpiece Material Range Steel, Non-Ferrous, Cast Iron, Plastics
Country of Origin Import
Prop 65 Warning Many metalworking products do contain metals that are included in the latest Prop 65 warning. Exposure to the elements can be harmful. May cause cancer and reproductive harm.