Precision Twist Drill 5996426 Letter R HSS Jobber Length Drill Bit

The Precision Twist Drill 5996426 is a Letter Size "R" High-Speed Steel (HSS) Jobber Length Drill Bit engineered for general-purpose drilling in a wide range of materials including steel, aluminum, brass, copper, cast iron, and plastics. Manufactured by Precision Twist Drill (PTD), a trusted name in American cutting tool production, this bit delivers consistent, accurate hole sizing for professional and industrial applications.

Key Features:

• Size: Letter "R" (0.3390" / 8.61 mm diameter)
• Construction: Premium High-Speed Steel (HSS) for heat and wear resistance
• Style: Jobber length — the most versatile and widely used drill bit length
• Point Angle: Standard 118° split point for fast penetration and self-centering starts
• Flute Style: Right-hand cut, right-hand helix for efficient chip evacuation
• Finish: Black oxide finish for improved lubricity and corrosion resistance
• Shank: Straight round shank, compatible with standard 3-jaw drill chucks

Precision Twist Drill has been producing high-quality cutting tools in the USA since 1919. The 5996426 drill bit meets demanding tolerances required in machining, fabrication, maintenance, and repair operations. Suitable for use in hand drills, drill presses, and CNC equipment.