The Carmex Spiral Mill Threading Insert – BSPT (H17-14BSPTMT7) is a spiral threading and milling insert system designed for reliable performance across a wide range of machines. Its spiral geometry enables smooth cutting at higher feed rates, helping reduce machining time without sacrificing accuracy.

It suits a broad spectrum of applications—from machining small components on compact centers to heavy-duty work on high-power milling machines. Spiral fluted toolholders hold 1 to 9 inserts in a comparatively small cutting diameter, and the unique clamping method enables optimal indexability for consistent results.

• High-Feed, Smooth Cutting: The spiral design delivers smooth cutting at high feed rates, accelerating material removal and reducing overall machining time for efficient production.
• Compact, Indexable Insert System: Spiral fluted toolholders accommodate 1–9 inserts in a small diameter, with a unique clamping method that ensures reliable, repeatable index positioning.
• MT7 TiN-Coated Inserts for All Materials: Inserts are MT7 Sub-Micron Grade with Titanium Nitride multi-layer coating (ISO K10–K20). This general-purpose grade works with all materials and helps achieve a high-grade finish across threading, end milling, roughing, and finishing.

Designed to improve workflow and output, this spiral mill threading insert delivers consistent threading and milling performance with versatile material compatibility. The combination of fast cutting, reliable indexing, and a finishing-grade surface helps you complete jobs with confidence—whether you’re producing tight-tolerance threads or finishing passes on larger components.