Accupro T2640182B Spiral Point Tap 4-48 3 Flutes Plug

Product Description

The ACCUPRO T2640182B is a spiral point tap designed for cutting 4-48 unified fine threads in through-hole applications. Built from 3 percent vanadium high speed steel, this tap delivers improved wear resistance and edge retention compared to standard M2 HSS. It features a plug chamfer, 3 flutes, and a right-hand thread direction. The bright finish keeps coating buildup minimal and suits general-purpose threading work. With an overall length of 1.87 inches and an 11 mm thread length, it fits standard tap handles and machine tap holders. Primarily used by machinists and maintenance technicians threading small-diameter holes in steel components.

The T2640182B is suited for threading through-holes in steel and ferrous materials at the 4-48 UNF thread size. The plug chamfer provides a gradual lead-in, making it well-suited for machine tapping in CNC machining centers, drill presses, and tapping heads. The 2B class of fit meets standard commercial tolerance requirements for most threaded fastener applications. It is a common choice in precision fabrication shops, maintenance environments, and general metalworking operations where consistent 4-48 threads are required.

Key Features

• 3 percent vanadium high speed steel construction for extended tool life in steel applications
• Plug chamfer with 3 flutes for efficient chip evacuation in through-hole threading
• 2B class of fit for standard commercial thread tolerance
• Right-hand thread direction, compatible with standard tap holders and tapping heads
• Bright finish suitable for general-purpose threading without coating interference
• No coolant-through design; compatible with flood or manual lubrication

Compatibility

Designed as an OEM-style replacement tap for 4-48 UNF through-hole threading applications in steel and ferrous materials using standard tap holders and machine tapping equipment.

Installation Notes

This tap is installed by qualified machinists or maintenance technicians using standard tap handles, floating tap holders, or rigid tapping attachments. Ensure the workpiece is securely fixtured and the tap is aligned axially with the pilot hole before engaging. Apply appropriate cutting fluid for steel to reduce heat and extend tool life. Follow standard shop safety practices when operating tapping equipment.