Milwaukee Tool 49-57-5530 Tap Drill Set 12-24 Nc

Product Description

The MILWAUKEE TOOL 49-57-5530 is a 2-piece tap and drill bit set designed for cutting 12-24 NC (National Coarse) threads by hand. The set includes one standard hand plug tap and one No. 16 drill bit, both manufactured from high carbon steel with an oxide finish for corrosion resistance and surface hardness. This combination provides the correct pilot hole size and thread profile in a single matched set, reducing the chance of mismatched tooling on the job. It is well suited for electricians, plumbers, HVAC technicians, and general tradespeople who tap threads into metal enclosures, brackets, hangers, or structural components in the field or at the bench.

This set is intended for right-hand, standard hand tapping operations on ferrous metals and mild steel in residential, commercial, and light industrial settings. The No. 16 wire gauge drill bit is the correct pilot size for a 12-24 NC thread, making this a ready-to-use pairing for anyone cutting machine screw threads into sheet metal panels, junction boxes, or equipment mounting hardware. The compact packaging with no case makes it easy to add to a tool pouch or parts kit without bulk.

Key Features

• Matched 12-24 NC plug tap and No. 16 drill bit in one set
• High carbon steel construction on both tap and drill bit for durability in ferrous metals
• Oxide finish provides corrosion resistance and reduces galling during thread cutting
• Standard right-hand thread direction for conventional tapping applications
• Compact 2-piece format with no case for straightforward field use

Compatibility

Designed for use in standard hand tapping operations requiring a 12-24 NC thread profile with a No. 16 pilot drill. Compatible with conventional tap handles and standard T-handle tap wrenches used in trade applications.

Installation Notes

This set is typically used by electricians, HVAC technicians, and plumbers when threading holes in metal enclosures or structural hardware. Secure the workpiece before drilling and tapping to prevent movement. Apply cutting fluid or tapping oil to the tap before use to extend tool life and produce cleaner threads. Back the tap out periodically to clear chips and reduce the risk of tap breakage.