Precision Twist Drill 6001432 Letter W Aircraft Drill Bit

Product Description

The PRECISION TWIST DRILL 6001432 is a Letter W aircraft extension drill bit designed for deep-hole drilling applications where standard-length bits cannot reach. Built from high speed steel with an oxide finish, this bit features a 135-degree split point for self-centering entry without a center punch. The straight-cylindrical shank measures 0.386 inches in diameter and the overall length of 12 inches gives technicians the reach needed in tight or recessed work areas. Two spiral flutes carry chips out efficiently, and the web-thinned, tapered web construction reduces thrust at the cutting edge. General purpose tool performance suits a wide range of metals and structural materials.

This drill bit is suited for aerospace, aviation maintenance, and general metalworking applications where extended reach is required. The Series 502-12 designation identifies it as part of a recognized aircraft extension drill family, making it a standard choice for MRO shops, aircraft assembly facilities, fabrication shops, and industrial maintenance settings. Right-hand cutting direction is compatible with all standard drill presses and portable drill motors.

Key Features

• Letter W size (0.386 inches decimal) for precise hole sizing
• 135-degree split point with self-centering geometry eliminates pilot hole requirement
• 12-inch overall length provides extended reach into deep or obstructed areas
• High speed steel construction with oxide finish for corrosion and wear resistance
• Web-thinned tapered web reduces cutting thrust and improves chip evacuation
• Meets NAS 907 Type B standard for aircraft extension drills

Compatibility

Designed as an OEM-style aircraft extension drill bit compatible with standard straight-cylindrical shank drill chucks on drill presses, magnetic drills, and portable drill motors used in aerospace and general metalworking applications. Conforms to NAS 907 Type B specifications.

Installation Notes

Installation is performed by machinists, aviation maintenance technicians (AMTs), and general metalworkers using standard drill chucks accepting a 0.386-inch straight-cylindrical shank. Secure the workpiece fully before drilling to prevent movement during cutting. Appropriate cutting fluid or lubricant is recommended when drilling ferrous metals to extend tool life and improve hole finish. Follow applicable shop safety and aviation maintenance procedures when working on aircraft structures.