Milwaukee 5/16"-18 NC Plug Tap

Milwaukee 5/16"-18 NC Plug Tap

The Milwaukee 49-57-5142 5/16"-18 NC Plug Tap is a precision-machined threading tool built for clean, accurate internal threads in coarse-thread applications. Designed for durability and consistent performance, it features high carbon steel construction and a black oxide coating to resist corrosion and wear. The straight flute design handles general-purpose threading with ease, while the plug style makes it ideal for through-hole applications—helping you cut threads smoothly without unnecessary resistance.

Country of Origin
Varies by production batch

Key Features / Specifications

• Model / Part Number: 49-57-5142
• Brand: Milwaukee
• Size / Thread: 5/16"-18 NC (National Coarse)
• Product Type: Plug tap for internal threading
• Material: High Carbon Steel
• Finish: Black Oxide coating for corrosion resistance
• Tap Style: Straight flute for general-purpose threading
• Tap Type: Plug tap designed for through holes
• Shank: Square shank compatible with standard tap handles and wrenches
• Markings: Laser-etched for clear, long-lasting visibility
• Application Materials: Suitable for brass, aluminum, mild steel, and similar metals
• Usage Note: Hand use recommended — not for power tools
• Recommended Use: Best results with cutting fluid

Ideal For

• Creating or repairing internal coarse threads
• Through-hole threading in metal materials
• Mechanical, automotive, and general shop work
• Users needing reliable, consistent threading performance
• Anyone who prefers threads that go in cleanly—instead of turning into a stuck-and-stressed situation halfway through