Threading Inserts
Grade BLU
Try Carmex's premium PVD-coated threading grade — now in packs of 2 for one month only. Engineered for stainless steel, titanium and high-temp alloys.
(£4.99 each)
Why Grade BLU?
Carmex's premium PVD triple-layer coated grade — built for the materials that wear ordinary inserts down fast.
Premium PVD Coating
Triple-layer sub-micron grade for maximum tool life and surface finish.
Built for Tough Materials
Stainless, titanium, cast iron, non-ferrous metals & high-temp alloys.
Sharp Cutting Edges
Precision-ground geometry — clean threads, less rework.
Low-Risk Trial
2 inserts for £9.99 — try before you commit to a full pack of 10.
Inserts in this Offer
17 of our most popular Grade BLU 16ER profiles — ISO Metric, UN, UNJ, NPT and Whitworth (BSW/BSF).
Engineered for performance
Grade BLU is a sub-micron carbide with a PVD triple-layer coating, giving it the wear resistance and edge sharpness needed for the toughest threading jobs.
From M2 stainless studs to titanium aerospace components, BLU consistently outperforms standard uncoated grades on tool life, surface finish and chip control.
Common Questions
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Ready to try Grade BLU?
2 inserts. £9.99. One month only — don't miss it.
SHOP THE OFFER NOWNeed help choosing? Call 01732 887334 · Mon–Fri 8:30am–5pm
