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Carmex Carbide Threading Insert - NPSM - TiAlN Coated - 12I18NPSM

SKU:12I18NPSM

The Carmex Carbide Threading Insert with TiAlN coating is a durable, high-precision tool tailored for NPSM and other common thread profiles. Built for professional workshops and serious hobbyists ... Read more ↓
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ApplicationThreading
Thread FormNSPM
Internal or ExternalInternal
Insert Size12
Pitch18
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£32.37
Prices shown ex. VAT
5 days estimated lead time — subject to availability
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01732 887334
Mon – Thurs 8:30 – 17:30 · Fri 8:30 – 16:30

The Carmex Carbide Threading Insert with TiAlN coating is a durable, high-precision tool tailored for NPSM and other common thread profiles. Built for professional workshops and serious hobbyists alike, it delivers reliable performance across a range of threading tasks.

  • Thread profiles covered: Broad support for common threading standards, including NPSM, enabling efficient work on multiple projects with a single insert.
  • Material: Carbide base with a TiAlN coating for exceptional hardness, wear resistance, and heat tolerance in demanding cutting conditions.
  • Coating: TiAlN provides extended edge life and better performance on harder metals and higher-speed machining.
  • Length options: Five lengths available, ranging from 12 mm to 40 mm to fit different hole depths and cutting setups.
  • Pitch range: Supports pitches from 0.5 mm (32 TPI) to 6.0 mm (4 TPI), with capability depending on the chosen length.
  • Edge design: Double-sided design offers two cutting edges (where applicable), allowing more use per insert before indexing.
  • Internal vs external capability: In many thread profiles, the same insert can machine both internal and external threads, with exceptions for ISO, UN, NPSM, UNJ, and Acme standards.

This insert helps you achieve consistent thread quality with fewer tool changes and longer service life thanks to its carbide substrate and TiAlN coating. The precise geometry and durable coating minimize heat build-up and wear, delivering clean, accurate threads on a variety of materials. Ideal for CNC lathes and precision turning applications, it supports efficient production workflows and dependable results on NPSM and other common thread profiles.

Application Threading
Thread Form NSPM
Internal or External Internal
Insert Size 12
Pitch 18

What time are Protool open?

We are open Monday to Friday between 8:30am and 5pm.

Do you offer Free Next Day delivery?

Yes! We offer Free Next Day delivery via Royal Mail Tracked 24 on all orders over £50 ex VAT*. We also offer Free DPD Local Next Day delivery on all orders over £100 ex VAT*.

We also offer the following:

  • Royal Mail Tracked 24 — £5.90 (FREE on orders over £50 ex VAT*). Order before 4:30pm for next day delivery. No signature required.
  • DPD Local Next Day — £8.00 (FREE on orders over £100 ex VAT*). Standard next day delivery to UK mainland addresses.
  • Royal Mail Special Delivery — £12.50. Guaranteed delivery before 1pm the next working day.
  • DPD Saturday Delivery — £25.00. Must be ordered on Friday before 4pm. Pre-12pm delivery.

For delivery to Scottish Highlands & Islands, Northern Ireland, Republic of Ireland, or overseas locations, additional charges apply. Please see our delivery page for full details, or call us on 01732 887 334.

*T's & C's and exclusions apply. Please see our delivery page for more information on all our services.

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Staff are very helpful and interested in providing a good service making us the customer feel valued.
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honest about stock and prices are competitive.
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Staff are very helpful and polite.Goods that were in stock were dispatched same day and back orders were quick in coming through .
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Buying experience
Phone requests are handled quickly and without any fuss. The website is easy to use and straightforward to order from. It’s especially helpful that it shows real‑time availability, so we don’t need to call to confirm whether parts will arrive.
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Full Range: Carmex Carbide Threading Inserts - NPSM - TiAlN Coated

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You are viewing 12I18NPSM. Click any other SKU to view its full details.

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