Tool-flo 604600RN4E Threading Insert FLT-4R GP50E 4-20 Tpi

Product Description

The TOOL-FLO 604600RN4E is a carbide threading insert designed for both internal and external thread cutting operations across a range of 4 to 20 TPI. It belongs to the Flo-Lock series and carries a GP50E manufacturer grade, placing it in the C5/C6 carbide material grade range. The insert features a 60-degree V-thread form, a chipbreaker geometry, and a Titanium Nitride finish applied via PVD coating. At 0.255 inches thick with a tip-to-top height of 0.128 inches, this insert is built for right-hand threading on lathes and thread-turning setups. Installation and tooling changes are handled by machinists and CNC turning professionals.

This insert is suited for thread turning applications in both production and job-shop environments. The FLT insert style and Flo-Lock series designation make it compatible with TOOL-FLO Flo-Lock threading toolholders designed for that insert family. The 4-20 TPI range covers coarse and fine unified thread forms commonly encountered in general machining, fastener production, and component threading. The right-hand orientation and 60-degree included angle make it a standard fit for the majority of inch-series threading work on CNC and manual lathes.

Key Features

• Carbide construction with GP50E grade, rated C5/C6 for threading applications
• PVD-applied Titanium Nitride coating for wear resistance and extended tool life
• Covers both internal and external thread cutting from 4 to 20 TPI
• 60-degree V-thread form with integrated chipbreaker geometry
• Right-hand cut orientation; FLT insert style for Flo-Lock toolholders
• Corner radius range of 0.005 to 0.008 inches for controlled thread root form

Compatibility

Designed for use with TOOL-FLO Flo-Lock series threading toolholders that accept FLT-style inserts. Verify toolholder designation and insert pocket size before ordering.

Installation Notes

Threading inserts should be installed and indexed by a qualified machinist following the toolholder manufacturer's torque and clamping guidelines. Power down and lock out the machine spindle before changing or indexing inserts. Inspect the insert pocket and clamping screw for wear or damage before seating a new insert. Follow applicable shop safety standards when handling carbide tooling, as edges are extremely sharp.