Milwaukee 1/4"-18 NPT Hex Die

Milwaukee 1/4"-18 NPT Hex Die

The Milwaukee 49-57-5391 1/4"-18 NPT Hex Die is a precision threading tool designed for cleanly creating or repairing external pipe threads, making it a reliable choice for maintaining fittings and connections. Built from high carbon steel with a corrosion-resistant black oxide finish, it delivers durability and consistent performance. The hex-shaped design allows for use with die stocks or standard wrenches, giving you flexibility on the job—because sometimes the tool you need isn’t the one closest at hand.

Country of Origin
Varies by production batch

Key Features / Specifications

• Model / Part Number: 49-57-5391
• Brand: Milwaukee
• Size / Thread Type: 1/4"-18 NPT (National Pipe Taper)
• Product Type: Hex die
• Material: High carbon steel for strength and long tool life
• Coating: Black oxide finish for corrosion resistance
• Precision: Machined for clean, accurate thread cutting and repair
• Design: Hex die shape (1-7/16") compatible with die stocks or standard wrenches
• Function: Suitable for cutting or repairing external threads
• Markings: Laser-etched for clear, long-lasting identification
• Setup: Clearly labeled starting side for easier threading alignment
• Application Materials: Works on brass, aluminum, mild steel, and other metals
• Best Practice: Use with cutting fluid for improved performance and tool life

Ideal For

• Creating or repairing 1/4"-18 NPT external pipe threads
• Plumbing, mechanical, and shop work requiring precise thread restoration
• Jobs where flexibility to use a wrench or die stock is beneficial
• Anyone who wants clean threads the first time instead of fixing them twice (because rework is never on the schedule)