Accupro T2670182B Spiral Point Tap 4-48 2 Flutes Hss

Product Description

The ACCUPRO T2670182B is a spiral point tap designed for threading 4-48 unified fine threads in through-hole applications. Built from 3% vanadium high speed steel, it delivers greater wear resistance than standard HSS for extended tool life in production and maintenance work. The plug chamfer style distributes cutting load across the leading threads, making it well-suited for machine tapping where chip ejection and thread accuracy are critical. With an overall length of 1.87 inches and a 2-flute configuration, it produces clean right-hand threads to a 2B class of fit. Machinists, tool and die technicians, and maintenance mechanics are the primary users of this tap.

This tap is rated for aluminum applications and is a practical choice for small-fastener threading work in aerospace components, electronics enclosures, instrument panels, and general light-duty assemblies where 4-48 UNF threads are specified. The bright finish is left uncoated, making it a cost-effective option for shops working with non-ferrous materials or low-alloy steels where specialty coatings are not required. It is sized for standard 4-48 hand or machine tap holders.

Key Features

• Spiral point design pushes chips ahead of the tap for clean through-hole threading
• 3% vanadium high speed steel provides improved hardness and wear resistance over standard M2 HSS
• Plug chamfer distributes cutting load and reduces entry torque in machine tapping operations
• 2B class of fit meets standard commercial thread tolerance requirements
• Right-hand thread direction for conventional tapping setups
• Bright finish suits aluminum and other non-ferrous material applications

Compatibility

Designed for use in standard 4-48 UNF through-hole tapping applications, compatible with hand tap wrenches and machine tap holders sized for the 3.58 mm shank diameter. Rated material application is aluminum.

Installation Notes

This tap should be installed in a properly aligned tap holder or tapping head to prevent thread misalignment and tap breakage. Always ensure the workpiece is securely fixtured before tapping. Use an appropriate cutting fluid or lubricant for the workpiece material to extend tap life and improve thread finish. Worn or damaged taps should be replaced before use to avoid thread damage or tap breakage in the workpiece.