Please log in here to access all benefits, including promotional discounts and faster checkouts.
Carmex Carbide Threading Insert - NPSF - TiAlN Coated - 21-14NPSF
| Application | Threading |
| Thread Form | NPSF |
| Internal or External | Internal & External |
| Insert Size | 21 |
| Pitch | 14 |
Learn more about Klarna
The Carmex Carbide Threading Insert in NPSF, TiAlN coated, 21-14NPSF is a versatile threading solution built for machinists and production shops that need reliable performance across a broad range of thread profiles.
- Five length options: available in 12 mm to 40 mm lengths to match your cutting geometry and pitch requirements
- TiAlN-coated carbide: hard-wearing coating enhances wear resistance and heat tolerance for consistent threading at higher speeds
- Double-sided cutting edges: two cutting edges per insert (except BSPT / NPT / NPTF / American Buttress / API RD) for extended life
- Internal & external threading capability: the same insert can machine both internal and external threads for many profiles (except ISO/UN/NPSM/UNJ/Acme)
- Broad thread-profile coverage: designed to handle all common thread forms with a single, adaptable insert family
Whether you’re producing precision fasteners, fittings, or components with varied thread forms, this insert delivers reliable thread quality and long tool life. The TiAlN coating helps maintain a sharp edge under demanding conditions, while the double-edged design lowers downtime by reducing tool changes. With multiple length options and compatibility across many profiles, you can streamline setup, simplify inventory, and improve throughput on both turning and threading operations.
| Application | Threading |
| Thread Form | NPSF |
| 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 - NPSF - TiAlN Coated
View full collection →You are viewing 21-14NPSF. Click any other SKU to view its full details.
| Product SKU | Insert Size | Pitch | Price | Stock | Order |
|---|---|---|---|---|---|
| 12-18NPSF | 12 | 18 | £26.50 | 5 days | |
| 14-14NPSF | 14 | 14 | £26.50 | 5 days | |
| 14-18NPSF | 14 | 18 | £26.50 | 5 days | |
| 21-11.5NPSF | 21 | 11.5 | £35.22 | 5 days | |
| 21-14NPSF Viewing | 21 | 14 | £35.22 | 5 days | |
| 30-11.5NPSF | 30 | 11.5 | £48.30 | 5 days | |
| 30-8NPSF | 30 | 8 | £48.30 | 5 days | |
| 40-11.5NPSF | 40 | 11.5 | £83.54 | 5 days | |
| 40-8NPSF | 40 | 8 | £83.54 | 5 days |
No products match your filters.
