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The CARMEX 3/8INRHAG60P25C is a solid carbide laydown threading insert designed for right-hand internal partial profile 60-degree thread cutting. Manufactured in grade P25C with a PVD-applied TiN (titanium nitride) coating, this insert covers a thread pitch range of 48 to 8 TPI (0.50 to 3.00 mm pitch), making it a versatile choice for general-purpose threading operations. The 3/8-inch inscribed circle (IC) and 0.146-inch thickness conform to the 16IR insert style standard. Machinists and toolroom professionals use this insert in CNC lathes and turning centers for producing internal threads in a wide range of workpiece materials.
This insert is suited for universal workpiece material categories including ferrous and non-ferrous metals, stainless steels, high-temperature alloys, aluminum and non-metallic materials, and cast iron, reflected in its multi-code workpiece classification (H, K, M, N, P, S). The partial profile 60-degree thread form means the insert cuts thread flanks without finishing the crest, requiring the bore to be pre-machined to the correct minor diameter. It is a standard choice for shops threading metric and unified internal threads across production and maintenance turning applications.
Designed as a direct-fit laydown threading insert for 16IR-style toolholders accepting a 3/8-inch inscribed circle insert. Suitable for use across workpiece material groups H, K, M, N, P, and S as defined by ISO material classification.
Installation should be performed by a qualified machinist following the toolholder manufacturer torque and clamping specifications for 16IR insert pockets. Always index or replace the insert with the machine powered down and the spindle fully stopped. Confirm correct insert orientation and seating before resuming cuts. Follow applicable shop safety procedures and machine guarding requirements when changing cutting inserts.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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