Value Collection MSC-04504403 Spiral Point Tap 4-40 Unc

Product Description

The VALUE COLLECTION MSC-04504403 is a spiral point tap designed for cutting 4-40 UNC internal threads in through-hole applications. Built from high speed steel (HSS) with a bright uncoated finish, this plug-chamfer tap drives chips forward ahead of the cutting edge, making it well-suited for use in production and repair threading operations. It features 2 flutes, a right-hand thread direction, and an H2 thread limit, which controls the tolerance of the finished thread to ensure consistent 2B and 3B class of fit results. The 9/16 inch thread length provides adequate engagement for most standard fastener depths in this size range.

This tap is used in light-duty threading applications where 4-40 UNC threads are required in through-holes. It is appropriate for use in metal fabrication, machine shops, electronics assembly, and general maintenance environments. The plug chamfer style makes it the standard choice for starting in a pre-drilled through-hole and completing the thread in a single pass. Machinists, tool and die makers, and maintenance technicians regularly work with taps in this configuration for small-diameter threading tasks.

Key Features

• 4-40 UNC thread specification for fine-pitch small-diameter through-hole threading
• High speed steel construction provides durability across a range of work materials
• Plug chamfer style for standard through-hole starting and thread completion
• 2 flutes with forward chip ejection suited to spiral point design
• H2 thread limit for consistent 2B/3B class of fit tolerance control
• Right-hand thread direction, bright uncoated finish, no coolant-through required

Compatibility

Designed as a standard replacement or production tap for applications requiring 4-40 UNC right-hand internal threads in through-hole configurations with a 2B or 3B class of fit.

Installation Notes

This tap is installed by machinists or maintenance technicians using a tap wrench, tapping head, or CNC tapping cycle. Always start with the correct tap drill size for 4-40 UNC to ensure proper thread engagement and avoid tap breakage. Secure the workpiece and align the tap perpendicular to the drilled hole before applying cutting pressure. Use an appropriate cutting fluid for the work material to extend tap life and improve thread finish.