Tool-flo 613600LN4C Threading Insert GP50 Carbide 10-44 Tpi

Product Description

The TOOL-FLO 613600LN4C is a left-hand threading insert designed for both internal and external thread cutting applications in metalworking and machining operations. Built to the FLTK-3L insert style and manufactured from carbide with a Titanium Nitride finish applied via PVD coating, this insert carries a GP50 manufacturer grade and a C5/C6 material grade rating. It covers a 60-degree V thread standard and handles external pitches from 10 to 44 TPI and internal pitches from 9 to 24 TPI. The Flo-Lock series design provides secure seating and consistent thread form across a wide pitch range. Machinists and toolroom technicians select this insert for precision threading on CNC lathes and manual turning centers.

This insert is suited for threading operations in production and job-shop environments where left-hand thread profiles are required on external diameters and internal bores. The 60-degree included angle makes it compatible with unified and standard V-thread forms. It fits machines set up for size-3 Flo-Lock toolholders and is appropriate for use on materials in the C5 and C6 carbide application range, including steel, cast iron, and similar ferrous workpieces.

Key Features

• Left-hand insert orientation for left-hand thread cutting on external and internal features
• External pitch range: 10 to 44 TPI; internal pitch range: 9 to 24 TPI
• 60-degree V thread form for unified and standard thread profiles
• GP50 grade carbide substrate with PVD-applied Titanium Nitride coating for wear resistance
• Insert size 3, Flo-Lock series for positive lock seating in compatible toolholders
• Tip-to-top dimension of 0.1410 inches; thickness of 0.1950 inches

Compatibility

Designed for use with Flo-Lock series size-3 threading toolholders that accept the FLTK-3L insert style. Verify toolholder seat geometry and insert hand orientation before installation.

Installation Notes

Threading inserts of this type are installed and indexed by qualified machinists or toolroom technicians following machine tool manufacturer guidelines. Power down and lock out the spindle before changing or indexing any insert. Use the appropriate torque wrench and clamping screw specified for the Flo-Lock toolholder to avoid seat damage. Inspect the insert pocket for chips or debris before seating the insert.