Milwaukee Tool 49-57-5534 Tap Drill Set 1/4-20 Nc 2 Piece

Product Description

The MILWAUKEE TOOL 49-57-5534 is a 2-piece tap and drill set designed for cutting 1/4"-20 NC (National Coarse) threads in metal, plastic, and other common trade materials. The set includes one 1/4"-20 NC plug tap and one No. 7 drill bit, giving the technician both the clearance drill and the thread-cutting tool in a single package. Both the tap and the drill bit are manufactured from high carbon steel with an oxide finish on the tap, providing adequate hardness for standard hand-tapping operations. This set is suited for electricians, plumbers, HVAC technicians, and general tradespeople who need to create tapped holes in the field or shop.

This set is appropriate for residential and light commercial applications where 1/4"-20 NC threaded holes are required, such as panel work, conduit fittings, equipment mounting, and mechanical connections. The plug tap style is the standard starting point for threading through-holes or partially threaded blind holes. The included No. 7 drill bit is the correct tap drill size for a 1/4"-20 NC thread at approximately 75 percent thread engagement. No case is included; the set is sold loose for direct tool-bag or bin use.

Key Features

• Includes one 1/4"-20 NC plug tap and one No. 7 drill bit for a complete thread-cutting setup
• High carbon steel construction on both tap and drill bit for standard-duty hand tapping
• Oxide finish on the tap for corrosion resistance during storage and use
• Right-hand thread direction for standard fastener compatibility
• Compact 2-piece format sized for field use without a dedicated case

Compatibility

Designed for cutting standard 1/4"-20 NC right-hand threads using conventional tap handles and brace-style wrenches compatible with standard hand taps.

Installation Notes

Installation is performed by a licensed tradesperson or qualified mechanic using a tap handle or T-handle wrench. Before tapping, drill the pilot hole with the included No. 7 bit and apply cutting fluid to the tap to reduce friction and extend tool life. Back the tap off a half turn periodically to break chips when threading steel or harder materials. Follow all applicable worksite safety procedures and de-energize or isolate any equipment before drilling or tapping into enclosures or structural components.