Kennametal 4176204 Threading Insert 20 Tpi Carbide Altin

Product Description

The KENNAMETAL 4176204 is a Top Notch series carbide threading insert designed for external UN thread cutting at 20 TPI. Manufactured from solid carbide with a PVD-applied AlTiN finish, it delivers heat resistance and edge retention under demanding threading conditions. The insert carries a 60-degree included angle and a 0.0062-inch corner radius, conforming to standard UN thread form geometry. Insert size is 3, with a thickness of 0.195 inches (4.95 mm). Machinist and toolroom technicians install this insert into compatible Top Notch threading toolholders for high-production external threading on lathes and turning centers.

This insert is suited for external threading operations on CNC lathes and manual turning equipment wherever a 20 TPI UN thread form is required. The KCU10 grade with AlTiN coating performs well in steel and alloy applications at moderate-to-high cutting speeds. Right-hand cutting orientation makes it the standard choice for conventional external threading passes. It is sold individually per package, with a minimum order quantity of 5 units.

Key Features

• Carbide substrate with PVD AlTiN finish for elevated wear and heat resistance
• 20 TPI external UN thread profile with 60-degree included angle
• KCU10 manufacturer grade optimized for threading in steel and alloy materials
• Corner radius of 0.0062 inches (0.16 mm) for accurate thread root form
• Right-hand cutting orientation for standard external threading passes
• Top Notch series insert size 3, thickness 0.195 inches

Compatibility

Designed for use in KENNAMETAL Top Notch series threading toolholders that accept size 3 NTC inserts. Confirm toolholder insert pocket specifications before installation.

Installation Notes

Threading inserts of this type are installed and changed by machinists or toolroom technicians. Power down and lock out the machine spindle before seating or removing any insert. Ensure the insert pocket is clean and free of chips or debris before clamping the insert in place. Follow the toolholder manufacturer torque specifications for the clamping screw and verify thread form with a thread gauge after the first pass.