Tool-flo 613800LJ5R Threading Insert GP3 Carbide 6-20 Tpi

Product Description

The TOOL-FLO 613800LJ5R is a left-hand carbide threading insert in the Flo-Lock series, designed for both internal and external thread cutting operations. Built to the FLTP-3L insert style and manufactured to GP3 grade using micrograin carbide, this insert covers internal pitches from 5 to 12 TPI and external pitches from 6 to 20 TPI. A titanium nitride (TiN) coating applied via PVD process improves surface hardness and wear resistance. Machinists and toolroom technicians use this insert for precision threading on CNC lathes and manual turning centers where a 60-degree V-thread form is required.

This insert is suited for production and job-shop environments where consistent left-hand thread profiles are needed on both internal bores and external diameters. The 60-degree included angle conforms to standard unified and metric V-thread forms. The size 3 insert fits compatible Flo-Lock toolholders. It is appropriate for threading ferrous and non-ferrous materials where a TiN-coated micrograin carbide grade provides adequate tool life at moderate cutting speeds.

Key Features

• Left-hand FLTP-3L insert style for left-hand thread cutting applications
• GP3 micrograin carbide grade with PVD-applied titanium nitride coating for extended wear life
• Covers internal pitch range of 5-12 TPI and external pitch range of 6-20 TPI
• 60-degree V-thread form supports unified and standard metric thread standards
• Minimum corner radius of 0.005 inches, maximum corner radius of 0.008 inches for controlled thread root geometry
• Compatible with both internal and external threading operations in a single insert style

Compatibility

Designed for use with Flo-Lock series toolholders accepting size 3 FLTP-style threading inserts. Verify holder designation against TOOL-FLO Flo-Lock series documentation before ordering.

Installation Notes

Threading inserts are installed and replaced by machinists or toolroom technicians. Ensure the machine spindle is fully stopped and all motion is locked out before seating or removing the insert. Confirm the insert is properly seated and clamped to the specified torque indicated in the toolholder manufacturer documentation before resuming cuts. Do not use a damaged or chipped insert, as this can cause thread form errors and workpiece scrap.