Screw Machine Length Drill
VIKING 23/64 Type 260-UB Ultra Bor Super Premium HSS Heavy Duty Screw Machine Length Drill

Screw Machine Length Drill

Made In The USA
Item #: 01-912-203
Size Type: Fractional
Size: 23/64"
Drill Point Angle: 135°

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Designed for series 300 stainless steel, except for 303


  • Much tougher than cobalt steel.
  • Thin web design will penetrate the work hardening (series 300, except for 303 which is free machining) stainless steel fast enough to continually cut beneath the chip which is hardening from deformation.
  • 135° split point design stops drill walking, holds tighter hole size and takes a smaller chip resulting in less heat.
  • Low temperature stress relief improves lubricity and toughness.


  • Outperforms cobalt drills in work hardening stainless steel applications.


  • Manufactured to NAS 907C specification.
  • Nitro-carburized flute has an increased Rockwell hardness.
  • Rich amber color.
Viking 87900 23/64" 135° Ultra Bor Super Premium HSS Screw Machine Drill
Product Specifications
Size Type Fractional
Size 23/64"
Drill Point Angle 135°
Tool Material Premium High Speed Steel
Finish Coating Bronze
Cutting Direction Right Hand
Point Sharpening Type Split Point
Diameter .3594"
Decimal Size .3594"
Drill Type Screw Machine Length
Drill Grade Heavy Duty
Flute Length 1-3/4"
Flute Shape Standard Spiral, Helical Flute
Grade Heavy Duty
Hardness 58 to 60 RC
Helix Angle 30°
No. of Flutes 2
No. of Sizes 6
Helix Angle & Style 30°
Overall Length 3-1/16"
Prop. 65 Yes
Series 260-UB
Shank Style Straight Shank
Type Screw Machine Length Drill
Workpiece Material Range Steel, Stainless Steel, Non-Ferrous, Cast Iron, Plastics
weight 0.0999 lbs
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.

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