Tool-flo 5003611AC22A Threading Insert 11.5 Tpi Npt Carbide

Product Description

The TOOL-FLO 5003611AC22A is a solid carbide laydown threading insert designed for cutting external NPT threads on a lathe or CNC turning center. Manufactured in the 16ER style, it produces right-hand external threads at 11.5 TPI conforming to the NPT standard, making it a direct fit for pipe thread applications in plumbing, oil and gas, and fluid-handling fabrication work. The insert features an AlTiN coating applied via PVD process, which improves heat resistance and extends tool life in ferrous and stainless materials. The inscribed circle measures 3/8 inches, and the cutting edge to theoretical edge length is 0.0400 inches.

This insert is suited for external NPT thread turning in light to medium production environments. It is commonly used by machinists and toolroom operators cutting pipe threads in carbon steel, alloy steel, and similar materials. The 11.5 TPI pitch matches the NPT specification for fittings typically found in 3/8-inch and 1/2-inch pipe sizes. It seats in 16ER-compatible toolholders and is a single-tooth design, meaning each side provides one active cutting edge per pass.

Key Features

• Solid carbide substrate for rigidity and wear resistance in threading operations
• AlTiN coating via PVD process for improved thermal resistance and tool life
• 16ER insert style - compatible with standard 16ER external threading toolholders
• 11.5 TPI pitch to NPT thread standard for right-hand external pipe threads
• 3/8-inch inscribed circle with face-of-insert to tip centerline of 0.0600 inches
• Single-tooth design with one cutting edge per side

Compatibility

Designed for use in 16ER-style external threading toolholders. Cuts right-hand external NPT threads at 11.5 TPI. No additional specific compatible model or system data was provided in the product information.

Installation Notes

Installation is performed by a machinist or CNC operator. Before seating the insert, ensure the machine spindle is fully stopped and locked out per shop safety protocol. Seat the insert firmly into the 16ER toolholder pocket and torque the clamping screw according to the toolholder manufacturer specification. Inspect the cutting edge for chips or coating damage before each use, as a compromised edge will produce out-of-tolerance thread forms.