Milwaukee Tool 49-57-5521 Tap Drill Set 8-32 Nc 2 Piece

Product Description

The MILWAUKEE TOOL 49-57-5521 is a 2-piece tap and drill set designed for cutting 8-32 NC (Unified National Coarse) threads by hand. The set includes one 8-32 NC plug tap and one No. 29 drill bit, providing the correct pilot hole size and the threading tool in a single package. Both the tap and drill bit are manufactured from high carbon steel with an oxide finish on the tap for improved wear resistance and chip shedding. This combination set is used by electricians, plumbers, HVAC technicians, and general trade professionals who need to tap threads into metal during installation or repair work.

The 49-57-5521 is suited for light-duty hand tapping applications in sheet metal, electrical enclosures, brackets, strut, and similar ferrous materials encountered in residential and commercial trade work. The plug tap style makes it appropriate for through-holes and most standard tapping jobs. The included No. 29 drill bit is the correct tap drill size for 8-32 NC threads, eliminating the need to cross-reference a separate tap drill chart before starting the job.

Key Features

• Includes one 8-32 NC plug tap and one No. 29 drill bit — matched pair for 8-32 threading
• High carbon steel construction on both tap and drill bit
• Oxide coating on tap reduces friction and improves chip evacuation during hand tapping
• Standard hand tap style suits through-hole and most general tapping applications
• Right-hand thread direction for standard 8-32 NC fastener compatibility
• Compact 2-piece set reduces the chance of using a mismatched drill size

Compatibility

Designed for use with standard hand tap handles and tap wrenches that accept plug tap shanks. Intended for 8-32 NC thread cutting in ferrous metals and similar materials suitable for high carbon steel tooling.

Installation Notes

A licensed or journeyman tradesperson should use a properly sized tap wrench to maintain alignment and control torque when driving the tap by hand. Apply cutting oil or thread-cutting fluid to the tap before and during use to extend tool life and produce cleaner threads. Back the tap out periodically to break chips and prevent binding. Follow applicable NEC or other code requirements when tapping holes in electrical enclosures or structural components.