Milwaukee Tool 49-57-5293 Straight Flute Tap 1/2-14 Npt

Product Description

The MILWAUKEE TOOL 49-57-5293 is a straight flute tap designed for cutting 1/2-14 NPT internal pipe threads in metal workpieces. It features 4 flutes and a taper chamfer, which distributes cutting load across multiple leading threads for controlled thread formation. Built from high-carbon steel with a black oxide finish, the tap offers wear resistance suited to production and maintenance threading applications. With an overall length of 3.25 inches and a thread length of 0.375 inches, it fits standard tap wrenches and drill press setups. This tap is used by plumbers, pipefitters, machinists, and HVAC technicians cutting NPT threads in steel, cast iron, and similar materials.

This tap is suited for threading 1/2-14 NPT pipe thread applications in residential and commercial maintenance, fabrication, and repair settings. The taper chamfer entry makes it appropriate for through-hole threading where the tap can pass fully through the material. A right-hand thread direction is standard for NPT pipe fittings. The 2B class of fit is the standard tolerance class for most general-purpose internal pipe thread connections, ensuring compatibility with standard NPT fittings and pipe ends.

Key Features

• 1/2-14 NPT thread size for standard pipe thread applications
• 4 straight flutes for chip clearance during threading
• Taper chamfer distributes cutting load for smoother thread entry
• High-carbon steel construction for durability in ferrous and non-ferrous materials
• Black oxide finish reduces friction and provides corrosion resistance
• 2B class of fit meets standard tolerance requirements for NPT connections
• Right-hand thread direction matches standard NPT pipe fitting convention

Compatibility

Designed as an OEM-style replacement tap for use in any standard tap wrench, T-handle, or machine setup capable of accepting a 1/2-14 NPT tap for pipe thread cutting operations.

Installation Notes

This tap is installed by machinists, pipefitters, or plumbers using a calibrated tap wrench or tapping head. The workpiece should be secured in a vise and the pilot hole drilled to the correct tap drill size for 1/2-14 NPT before threading begins. Apply cutting fluid appropriate to the workpiece material to extend tap life and improve thread quality. Back the tap out periodically to break chips and prevent tap breakage, especially in blind holes or harder materials.