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Carmex Carbide Threading Insert - NPS - TiAlN Coated - 21-14NPS

SKU:21-14NPS

The Carmex Carbide Threading Insert for NPS (TiAlN coated, model 21-14NPS) is a versatile cutting solution designed for professional machinists who tackle a wide range of threading tasks. Built t... Read more ↓
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ApplicationThreading
Thread FormNPS
Internal or ExternalInternal & External
Insert Size21
Pitch14
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£35.22
Prices shown ex. VAT
5 days estimated lead time — subject to availability
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The Carmex Carbide Threading Insert for NPS (TiAlN coated, model 21-14NPS) is a versatile cutting solution designed for professional machinists who tackle a wide range of threading tasks. Built to cover all common thread profiles, it delivers reliable performance across internal and external applications.

  • Coating: TiAlN-coated carbide for improved heat resistance and extended edge life in demanding threading operations.
  • Coverage: A single insert family that supports all common thread profiles, reducing the need to switch between multiple inserts.
  • Edge Count: Double-sided cutting edges provide two usable edges per insert (except for BSPT/NPT/NPTF/American Buttress/API RD profiles), maximizing tool life.
  • Length Options: Five lengths ranging from 12 mm to 40 mm to suit different component sizes and machine setups.
  • Pitch Range: Depending on length, handles pitches from 0.5 mm (32 TPI) to 6.0 mm (4 TPI), covering a broad spectrum of industrial threading needs.
  • Internal/External Capability: For many thread profiles, the same insert machines both internal and external threads (note: some profiles are exceptions).
  • Material: Robust carbide construction designed for precision threading and long-term wear resistance.
  • Application Scope: Ideal for automotive, hydraulic, plumbing, and general manufacturing tasks requiring accurate, repeatable threads.

This threading insert is crafted to streamline production workflows: fewer tool changes, consistent thread quality, and the flexibility to tackle a variety of profiles with confidence. The TiAlN coating helps maintain sharpness under higher-speed operations, while the double-edged design reduces downtime by offering multiple usable edges from a single insert. Whether you’re finishing a 0.5 mm pitch on a compact component or cutting a 6.0 mm pitch on a larger part, this Carmex insert is a dependable choice for precise, repeatable results.

Application Threading
Thread Form NPS
Internal or External Internal & External
Insert Size 21
Pitch 14

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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Full Range: Carmex Carbide Threading Inserts - NPS - TiAlN Coated

View full collection →

You are viewing 21-14NPS. Click any other SKU to view its full details.

Product SKUInsert SizePitchPriceStock Order
12-18NPS 1218£26.50 5 days
14-14NPS 1414£26.50 In Stock
14-18NPS 1418£26.50 5 days
21-11.5NPS 2111.5£35.22 In Stock
21-14NPS Viewing2114£35.22 5 days
30-11.5NPS 3011.5£48.30 5 days
30-8NPS 308£48.30 In Stock
40-11.5NPS 4011.5£83.54 5 days

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