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The ISCAR 5901952 is a laydown-style threading insert designed for external ISO thread forms with a 1.50 mm pitch. Built from solid carbide with an IC908 manufacturer grade and a PVD-applied TiAlN coating, this insert delivers wear resistance and thermal stability across a broad range of workpiece materials. The right-hand cutting geometry suits standard external threading operations on CNC lathes and turning centers. With a 3/8 inch (0.375 inch) inscribed circle and a 0.143 inch thickness, the 5901952 fits the 16ER insert pocket style. It is sold individually but requires a minimum order of 5 units.
This insert is suited for external threading on turning centers in job shop, production machining, and maintenance environments. The IC908 grade with PVD coating is positioned as a universal-grade insert, rated for steel, stainless steel, cast iron, non-ferrous materials, high-temperature alloys, and other common workpiece categories. It is appropriate for finishing and semi-finishing ISO-standard external thread profiles at the 1.50 mm pitch, which is a common metric fastener thread pitch found in automotive, industrial, and general manufacturing applications.
Designed as a direct-fit replacement for 16ER-style laydown threading toolholders accepting a 3/8 inch inscribed circle insert with ISO external thread geometry.
Installation is performed by qualified machinists or CNC toolroom technicians. Power down and lock out the spindle before seating or changing inserts. Use the correct torx or clamp screw driver specified by the toolholder manufacturer to secure the insert without overtightening. Inspect the insert pocket and clamping components for wear or debris before seating a new insert to ensure proper contact and repeatability.
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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