The Carmex Threading Insert Kit - External - BLU Grade - KEM is a compact, ready-to-use collection of external threading inserts designed for fast, reliable thread work across a wide range of metals. It’s ideal for engineers, machinists, maintenance technicians, and hobbyists who need to repair, create, or reinforce external threads without swapping tools mid-job.

Featuring a PVD triple-layer coating over a sub-micron-grade substrate, these BLU-grade inserts resist wear and galling when used on stainless steels, cast iron, titanium, non-ferrous metals, and many high-temperature alloys. The kit includes ten inserts across five sizes: 16ER1.0ISOBLU x2, 16ER1.25ISOBLU x2, 16ER1.5ISOBLU x2, 16ER1.75ISOBLU x2, and 16ER2.0ISOBLU x2.

• Broad size coverage for common external threads: Includes two pieces of each size—16ER1.0ISOBLU, 16ER1.25ISOBLU, 16ER1.5ISOBLU, 16ER1.75ISOBLU, and 16ER2.0ISOBLU—to support M10–M20 applications with minimal tool changes.
• PVD triple-layer Blu coating for durability: Sub-micron-grade inserts with a triple-layer coating deliver outstanding wear resistance and longevity in hard metals and high-temperature alloys.
• Organized, ready-to-use kit in a durable case: Easy storage and fast access in the field or shop; foam inserts keep each insert in its place for safe transport.

With this kit, you gain precise, repeatable external threads across a broad material range, reduced downtime from tool swapping, and longer service life per insert. The Blu-grade coating and five-size mix ensure you can tackle jobs from simple repairs to more demanding applications with confidence and consistency, helping you finish projects faster and to a reliable standard.