Kennametal 4116676 Spiral Flute Tap 1/4-20 Unc Plug 2BX

Product Description

The KENNAMETAL 4116676 is a spiral flute tap designed for threading 1/4-20 UNC holes in steel and stainless steel. It features three left-hand spiral flutes with a 15-degree helix angle and a plug chamfer, making it well suited for through-hole tapping applications where chip evacuation is critical. The tap is manufactured from powdered metal and carries a multi-layer TiN/CrC/C coating that reduces friction and extends tool life in demanding workpiece materials. Overall length is 2.5 inches with a thread length of 0.44 inches and a tapping depth of 1.01 inches. Machinists and tool-and-die professionals working in job shops or production environments will find this tap appropriate for both manual and CNC tapping operations.

This tap is intended for use in non-ferrous metals, steel, and stainless steel, covering primary workpiece material codes P and M. It is part of the KENNAMETAL T620 series, a line built for consistent performance in difficult-to-machine materials. Typical applications include production threading in machining centers and drill presses where coolant-through capability is not required. The plug chamfer style provides a gradual lead-in and is appropriate for through-holes rather than blind-hole applications.

Key Features

• 1/4-20 UNC thread size with right-hand thread direction
• Three left-hand spiral flutes at 15-degree helix angle for effective chip evacuation
• Plug chamfer for through-hole threading applications
• Multi-layer TiN/CrC/C coating reduces friction and increases wear resistance in steel and stainless steel
• Powdered metal construction for consistent hardness and edge integrity
• 2BX class of fit for controlled tolerance threading

Compatibility

Designed as an OEM-style tooling replacement for 1/4-20 UNC tapping operations in steel and stainless steel; part of the KENNAMETAL T620 series. No specific machine model compatibility was stated in the product data.

Installation Notes

Installation and use of this tap should be performed by a qualified machinist familiar with tapping speeds, feeds, and cutting fluid selection for the target workpiece material. Always secure the workpiece and verify spindle alignment before beginning the tapping cycle. This tap does not support coolant-through delivery, so external cutting fluid application is recommended when tapping stainless steel or harder steels. Inspect thread flanks and chamfer for wear regularly and replace the tap before dimensional drift occurs.