Milwaukee Tool 49-57-5560 Tap Drill Set 1/2-13 Nc 27/64

Product Description

The MILWAUKEE TOOL 49-57-5560 is a two-piece tap and drill set designed for cutting 1/2 inch-13 NC (National Coarse) threads in metal. The set pairs a 1/2 inch-13 NC plug tap with a matched 27/64 inch drill bit, giving technicians the correct drill size and tap in a single package. Both the tap and drill bit are manufactured from high carbon steel with an oxide finish on the tap for added surface hardness and corrosion resistance. This set is used by electricians, plumbers, HVAC installers, pipefitters, and general maintenance trades who need to tap threaded holes in steel, iron, or similar materials on the job.

The 49-57-5560 is suited for standard hand tapping applications where a 1/2 inch-13 NC thread is required. This is a common thread specification found in structural fastening, equipment mounting, conduit fittings, and mechanical assemblies across residential and commercial jobsites. The plug tap style makes it appropriate for through-holes and partially blind holes where thread engagement starts after a few lead threads. The included 27/64 inch drill bit is the correct tap-drill size for 1/2 inch-13 NC threads, eliminating guesswork when preparing the hole.

Key Features

• Includes one 1/2 inch-13 NC plug tap and one 27/64 inch drill bit as a matched set
• High carbon steel construction on both the tap and drill bit for durability in metal threading applications
• Oxide coating on the tap provides surface hardness and basic corrosion protection
• Right-hand thread direction, the standard for 1/2 inch-13 NC fastening applications
• Plug tap style works in through-holes and most partially blind holes
• Two-piece set eliminates the need to cross-reference tap-drill charts separately

Compatibility

Designed for use in standard hand tapping operations requiring a 1/2 inch-13 NC thread. The 27/64 inch drill bit is the correct tap-drill diameter for this thread specification in most materials.

Installation Notes

A licensed tradesperson or qualified mechanic should verify the base material is suitable for hand tapping before use. Secure the workpiece and use a tapping fluid or cutting oil appropriate for the material to reduce tap wear and improve thread quality. Apply steady, controlled torque with a tap wrench and back off periodically to break chips, especially in deeper holes. Inspect the tap for wear or chipping before each use to avoid broken taps in the workpiece.