Value Collection JY4991451 Straight Flute Tap M4x0.50

Product Description

The VALUE COLLECTION JY4991451 is a straight flute tap designed for cutting internal metric fine threads in a range of ferrous and non-ferrous workpieces. This is an M4x0.50 plug chamfer tap ground to a D4 thread limit, with 4 flutes and a bright uncoated finish. The plug chamfer provides a gradual thread start, making it well suited for through-hole tapping applications. At 2.125 inches overall length with a 0.75 inch thread length, the tool is compact and compatible with standard tap handles and tapping heads. It is manufactured from high-speed steel, which provides good wear resistance and toughness across a wide range of shop conditions. Machinists, toolmakers, and maintenance technicians turn to this type of tap for precision threading in production and repair environments.

This tap is intended for metric fine threading operations where a standard M4 coarse pitch thread is not specified. Typical applications include threading tapped holes in machine components, fixtures, instrumentation housings, and fastener repair work. The straight flute geometry makes it appropriate for use in materials that produce broken or short chips, such as cast iron, aluminum, brass, and mild steel. The right-hand thread direction is the standard configuration for most general-purpose tapping work.

Key Features

• M4x0.50 metric fine thread form for applications requiring finer thread pitch than standard M4 coarse
• 4 straight flutes for chip clearance in short-chipping materials
• Plug chamfer provides gradual thread engagement, ideal for through-hole tapping
• D4 thread limit for consistent fit with standard metric fine tolerances
• High-speed steel construction offers durability across a broad range of workpiece materials
• Bright uncoated finish — no coating buildup to affect thread form accuracy

Compatibility

Designed as a standard replacement or production tap for any application requiring an M4x0.50 metric fine plug tap with straight flutes. Compatible with conventional tap handles, T-handles, and tapping head chucks sized for the M4 shank diameter.

Installation Notes

This tap is installed and operated by qualified machinists or maintenance technicians using appropriate tap handles or machine tapping equipment. Always ensure the workpiece is securely fixtured and the tap is properly aligned to the pre-drilled pilot hole before applying torque. Use a cutting fluid appropriate for the workpiece material to extend tool life and improve thread finish. Reverse the tap periodically to break chips when working in deeper holes or tougher materials.