Milwaukee Tool 49-57-5128 M5x0.9 Straight Flute Tap

Product Description

The MILWAUKEE TOOL 49-57-5128 is a straight flute tap designed for cutting right-hand M5x0.9 metric internal threads in through-holes and shallow blind holes. Built from high-carbon steel with a black oxide finish, this tap resists wear and provides lubricity during the tapping process. The plug chamfer features 3 to 5 tapered lead threads, making it a general-purpose choice suited for starting a thread partway through a hole. With 3 flutes and a Class 2B fit tolerance, it produces threads compatible with standard metric fasteners. Overall length is 2.25 inches and thread length is 25.40 millimeters. This tap is used by machinists, maintenance technicians, electricians, and plumbers working with metric-threaded assemblies.

This tap is suited for use in production and maintenance applications where M5x0.9 metric threads are required in ferrous and non-ferrous materials. The straight flute geometry works best in through-holes or shallow blind holes where chips can evacuate freely. It is a common choice for field repair work, panel fabrication, and equipment maintenance across electrical, mechanical, and plumbing trades.

Key Features

• M5x0.9 metric thread size with right-hand thread direction
• Plug chamfer for general-purpose starting in through-holes and shallow blind holes
• 3-flute straight flute design for chip clearance in softer and medium-hardness materials
• High-carbon steel construction for durability in standard tapping applications
• Black oxide coating reduces friction and provides mild corrosion resistance
• Class 2B fit tolerance for compatibility with standard metric fasteners

Compatibility

Designed as an OEM-style replacement tap for use in standard tap handles and tap wrenches accepting the appropriate shank diameter for M5 metric tapping applications.

Installation Notes

Tapping should be performed by a qualified machinist or trade professional using a properly sized tap handle or tapping fixture. Always use cutting fluid appropriate for the workpiece material to extend tap life and improve thread quality. Ensure the workpiece is secured before tapping to prevent movement. Reverse the tap periodically during use to break chips and reduce the risk of tap breakage.