Accupro T1640567 Spiral Point Tap 1/2-13 3 Flute Plug

Product Description

The ACCUPRO T1640567 is a spiral point tap designed for cutting right-hand internal threads in through-hole applications. Built from HSS-E Vanadium high speed steel with an oxide finish, this plug chamfer tap handles tough threading operations in ferrous and non-ferrous materials. The spiral point geometry pushes chips forward ahead of the cutting action, reducing clogging and enabling cleaner thread formation. Key dimensions include an overall length of 3.374 inches, a thread length of 1.141 inches, and a shank diameter of 0.367 inches. Licensed machinists and maintenance technicians install this tap in manual or machine tapping operations requiring 1/2-13 UNC thread profiles.

This tap is suited for production and maintenance threading in through-holes where chip evacuation is a priority. The 1/2-13 thread size is a common fastener standard in structural, mechanical, and equipment assembly applications across industrial, commercial, and maintenance environments. The H7 thread limit designation provides a consistent tolerance class appropriate for standard fit assemblies. The plug chamfer provides a gradual lead-in, making it effective in both machine and hand tapping setups where the tap has full entry access to the hole.

Key Features

• Spiral point geometry pushes chips forward for efficient through-hole threading
• HSS-E Vanadium steel construction provides improved toughness and wear resistance over standard HSS
• Oxide finish reduces friction and provides mild corrosion resistance during use and storage
• H7 thread limit ensures consistent tolerance for standard fit thread assemblies
• Plug chamfer with 3 flutes balances cutting load and chip clearance in machine tapping
• Right-hand thread direction for standard fastener compatibility

Compatibility

Designed for use in through-hole tapping operations requiring a 1/2-13 UNC right-hand thread form with an H7 thread limit tolerance class.

Installation Notes

This tap is installed by qualified machinists or maintenance technicians using a tap wrench, tapping head, or CNC machine tool holder appropriate for the shank diameter. Secure the workpiece before tapping and ensure the hole is drilled to the correct tap drill diameter for a 1/2-13 thread. Use appropriate cutting fluid to extend tool life and improve thread finish. Do not reverse the tap under load without releasing cutting pressure, as this can cause breakage.