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Carmex Carbide Threading Insert - NPS - TiAlN Coated - 21-14NPS
| Application | Threading |
| Thread Form | NPS |
| Internal or External | Internal & External |
| Insert Size | 21 |
| Pitch | 14 |
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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.
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 SKU | Insert Size | Pitch | Price | Stock | Order |
|---|---|---|---|---|---|
| 12-18NPS | 12 | 18 | £26.50 | 5 days | |
| 14-14NPS | 14 | 14 | £26.50 | In Stock | |
| 14-18NPS | 14 | 18 | £26.50 | 5 days | |
| 21-11.5NPS | 21 | 11.5 | £35.22 | In Stock | |
| 21-14NPS Viewing | 21 | 14 | £35.22 | 5 days | |
| 30-11.5NPS | 30 | 11.5 | £48.30 | 5 days | |
| 30-8NPS | 30 | 8 | £48.30 | In Stock | |
| 40-11.5NPS | 40 | 11.5 | £83.54 | 5 days |
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