Accupro T2640722B Spiral Point Tap 3/4-16 4 Flutes

Product Description

The ACCUPRO T2640722B is a spiral point tap designed to cut 3/4-16 UNF threads in steel and similar ferrous materials. Built from 3% Vanadium High Speed Steel with a bright finish, this plug-chamfer tap is engineered for through-hole tapping operations where chips are pushed ahead of the cutting action and cleared from the hole. It features 4 flutes, a Class 2B thread fit, and a right-hand thread direction. Overall length is 4.25 inches with a thread length of 37 millimeters and a shank diameter of 14.99 millimeters. It is installed by machinists and tooling professionals in production and maintenance environments.

This tap is suited for right-hand through-hole tapping in steels, where its spiral point geometry drives chips forward rather than backing them out. The plug chamfer, with its moderate lead-in, makes it appropriate for initiating threads in pre-drilled through holes without requiring a starting chamfer tool. It is commonly used in manual or CNC machine tapping setups operating on carbon steel, alloy steel, and similar ferrous workpieces where a 3/4-16 UNF thread form is required to Class 2B tolerance.

Key Features

• 3/4-16 UNF thread form with Class 2B fit for standard tolerance threaded connections
• Spiral point geometry drives chips forward, reducing clogging in through-hole applications
• 3% Vanadium High Speed Steel construction for improved wear resistance in steel cutting
• Plug chamfer provides 3-5 thread lead-in, suitable for starting threads in through holes
• Bright finish with no coating, allowing direct inspection of cutting edge condition
• Right-hand thread direction compatible with standard tapping equipment and tap handles

Compatibility

Designed for through-hole tapping operations in steels. Fits standard 3/4-inch tap holders and machine spindles accepting a 14.99-millimeter shank diameter. Compatible with manual tap wrenches, drill press tapping attachments, and CNC tapping cycles configured for right-hand rotation.

Installation Notes

This tap is installed by machinists and tooling professionals using standard tapping equipment. Ensure the workpiece is securely fixtured and the pre-drilled hole diameter is correct for a 3/4-16 UNF tap before beginning. Apply appropriate cutting fluid for the workpiece material to extend tool life and improve thread finish. Do not reverse the tap without clearing chips from the flutes, and do not exceed the rated material application of steels as listed by the manufacturer.