Century Drill Tool Co Inc 95411 Tap Drill Bit 1/2-13 2pc

Product Description

The CENTURY DRILL TOOL CO INC 95411 is a two-piece combo pack pairing a 1/2-13 National Coarse (NC) fractional tap with a 27/64-inch drill bit, sized as the correct tap drill for a 1/2-13 thread. The tap features precision-cut threads that are accurately formed for consistent, exact threading in a wide range of materials. Both tools are heat treated and tempered to achieve file-hard hardness, extending working life under repeated hand-cutting use. This combo is intended for hand tapping applications where a technician needs to cut clean internal threads in metal, plastic, or similar materials.

This set is suited for trade and maintenance professionals who need to tap new threads or chase damaged threads in the field. Typical applications include creating threaded holes in brackets, enclosures, pipe flanges, HVAC equipment panels, and electrical boxes during installation or repair work. The matched drill and tap pairing eliminates the need to look up tap drill charts, making it a practical grab-and-go combo for service vans and shop use alike.

Key Features

• 1/2-13 National Coarse tap thread specification — common fastener size in HVAC, plumbing, and electrical trade work
• 27/64-inch drill bit included, correctly sized as the tap drill for 1/2-13 NC threads
• Precision-cut, accurately formed threads for consistent and exact threading results
• Heat treated and tempered to file-hard hardness for longer tool life
• Designed for hand-cutting applications
• Two-piece combo pack — tap and matching drill bit sold together

Compatibility

Designed for hand tapping applications requiring a 1/2-13 National Coarse thread; compatible with standard tap handles and brace-style drivers that accept fractional tap shanks.

Installation Notes

This tool is installed and used by general tradespeople, maintenance technicians, and machinists performing hand tapping operations. Always secure the workpiece firmly before tapping, apply cutting oil to reduce heat and extend tap life, and back the tap off periodically to break chips. Do not use this tap in a powered drill or driver, as it is designed for hand-cutting use only.