Precision Twist Drill 5995511 7/16 Inch Hss Drill Bit

Product Description

The PRECISION TWIST DRILL 5995511 is a jobber-length, left-hand-cut drill bit designed for general-purpose drilling in steel and cast iron. It is manufactured from high-speed steel (HSS) with a bright, uncoated finish and features a standard 118-degree point angle with a web-thinned tip for improved penetration. The overall length is 5.5 inches, with a 4.0625-inch flute length and a 0.4375-inch straight shank diameter. The two-flute, regular-spiral design promotes efficient chip evacuation. This bit is suited for use by machinists, HVAC technicians, plumbers, and electricians performing metal drilling tasks during fabrication or service work.

The 5995511 is intended for drilling through steel and cast iron in both residential and light commercial applications. Its left-hand cutting direction makes it particularly useful when attempting to extract broken fasteners, as the rotation can back out a seized screw or bolt while drilling. The Series L10 designation places it within a standard jobber-length product family conforming to ANSI specifications. It is a single-piece, general-purpose tool appropriate for use in a standard drill press or hand drill with a compatible chuck.

Key Features

• Left-hand cutting direction aids in broken fastener extraction
• 118-degree standard point angle with web-thinned tip for cleaner entry
• HSS construction handles steel and cast iron at typical drilling speeds
• Bright, uncoated finish — no coating buildup to affect hole tolerance
• Regular spiral, 2-flute design supports consistent chip clearance
• ANSI-compliant Series L10 jobber-length construction

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with any standard drill press or hand drill equipped with a chuck that accepts a 0.4375-inch straight shank. Primary workpiece materials include steel and cast iron.

Installation Notes

This bit is installed and operated by machinists, maintenance technicians, and trade professionals performing metal drilling. Secure the straight shank fully in the chuck before operation and confirm chuck key is removed before starting the drill. Use appropriate cutting fluid or coolant when drilling harder metals to preserve cutting edge life. Always wear eye protection and follow applicable shop safety standards when operating rotary cutting tools.