Seco 00049856 Threading Insert 16 Tpi Unj Carbide CP500

Product Description

The SECO 00049856 is a laydown-style external threading insert engineered for precision thread-turning operations on CNC lathes and turning centers. Built from solid carbide in the CP500 grade and finished with a PVD-applied TiAlN/TiN coating, this insert delivers consistent thread profile accuracy on right-hand external UNJ threads at 16 threads per inch. The 60-degree included angle conforms to UNJ thread standards, and the 3/8 inch inscribed circle provides robust support in the toolholder pocket. It is part of the Snap-Tap series and is sold individually with a minimum order quantity of 2 pieces. Machinists and CNC operators in aerospace, industrial, and general metalworking shops are the primary users.

This insert is suited for right-hand external UNJ thread turning across a broad range of workpiece materials. The universal primary workpiece material designation covers cast iron, non-ferrous metals, non-metallic materials, steel, and high-temperature alloys, corresponding to ISO material codes K, M, N, P, and S. Typical applications include threading aerospace-standard fastener features and precision mechanical components where the UNJ thread form's controlled root radius is required to reduce stress concentration. It fits standard ER-style laydown threading toolholders with a 3/8 inch IC pocket.

Key Features

• Solid carbide CP500 grade with PVD TiAlN/TiN coating for extended tool life across diverse workpiece materials
• Right-hand external UNJ thread profile at 16 TPI with a 60-degree included angle
• 3/8 inch inscribed circle for secure, rigid seating in ER-style laydown toolholders
• Snap-Tap series design for consistent, repeatable insert indexing
• ISO-compliant geometry meeting UNJ thread standard requirements
• Corner radius of 0.0090 inches for accurate UNJ root form generation

Compatibility

Designed for use in ER-style laydown threading toolholders accepting a 3/8 inch inscribed circle insert. Compatible with workpiece materials classified under ISO codes K, M, N, P, and S, making it suitable for universal threading applications across steel, cast iron, aluminum, non-ferrous, and high-temperature alloy components requiring a UNJ external thread form.

Installation Notes

Installation is performed by a machinist or CNC operator following the toolholder manufacturer's insert seating and clamping procedure. Power down and lock out the machine spindle before changing inserts. Use the correct torx or hex key to the toolholder manufacturer's specified clamping sequence — do not overtighten the clamp screw, as carbide inserts are brittle. Verify insert seating and pocket cleanliness before resuming cutting operations.