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The VALUE COLLECTION 438T is an insert screw designed to secure indexable cutting inserts in toolholders, boring bars, milling cutters, and similar indexable tooling systems. These small-format fasteners are critical to maintaining precise insert seating and preventing insert movement during cutting operations. Weighing approximately 0.01 pounds, the 438T is a lightweight, purpose-built screw intended for use by machinists and tooling technicians working with indexable insert tooling across turning, milling, and boring applications.
Insert screws like the 438T are used in machine shops, manufacturing facilities, and production environments wherever indexable tooling systems are employed. They are typically replaced during routine tooling maintenance, after insert changes that result in thread wear, or when a fastener is damaged during service. Having the correct replacement insert screw on hand minimizes downtime during insert indexing and toolholder servicing.
Designed as a replacement insert screw for indexable tooling systems requiring the 438T fastener specification. Consult your toolholder documentation to confirm correct insert screw part number before ordering.
Insert screw installation and replacement should be performed by a qualified machinist or tooling technician. Always power down and lock out the machine before servicing any toolholder or cutting tool assembly. Use the correct Torx or hex key driver specified by the toolholder manufacturer to avoid fastener damage. Do not overtighten insert screws, as this can strip threads or crack the cutting insert.
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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