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Carmex Carbide Threading Insert - NPSM - TiAlN Coated - 21E11.5NPSM
| Application | Threading |
| Thread Form | NSPM |
| Internal or External | External |
| Insert Size | 21 |
| Pitch | 11.5 |
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Carmex Carbide Threading Insert - NPSM - TiAlN Coated - 21E11.5NPSM is a versatile threading solution designed for machinists and shops that demand consistent, reliable performance across common thread profiles. Built on a carbide body and finished with a durable TiAlN coating, this insert supports precise threads with extended life, even in demanding materials.
- Coating: TiAlN coating enhances wear resistance and heat tolerance, helping maintain edge sharpness and prolong insert life.
- Material: Carbide body delivers rigidity and wear resistance for clean, accurate thread milling and turning.
- Double-sided design: Two cutting edges per insert (except for BSPT/NPT/NPTF/American Buttress/API RD profiles), enabling edge rotation to extend service life and reduce downtime.
- Thread profile coverage: Designed to tackle all common thread profiles with wide compatibility, while noting that ISO/UN/NPSM/UNJ/Acme profiles may limit internal/external reuse on a single edge.
- Length options: Five lengths available (from 12 mm to 40 mm) to suit different tooling needs and pitch requirements.
- Pitch range: Depending on length, supports pitches from 0.5 mm (32 TPI) up to 6.0 mm (4 TPI) for flexibility across applications.
This threading insert family is ideal for workshops and production environments that require a compact, reliable solution for both internal and external threading tasks. The combination of a TiAlN-coated carbide body, dual cutting edges, and a broad range of lengths and pitches enables consistent thread quality, reduced tool changes, and greater versatility in everyday machining scenarios.
| Application | Threading |
| Thread Form | NSPM |
| Internal or External | External |
| Insert Size | 21 |
| Pitch | 11.5 |
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 - NPSM - TiAlN Coated
View full collection →You are viewing 21E11.5NPSM. Click any other SKU to view its full details.
| Product SKU | Insert Size | Pitch | Price | Stock | Order |
|---|---|---|---|---|---|
| 12I18NPSM | 12 | 18 | £32.37 | 5 days | |
| 14E18NPSM | 14 | 18 | £32.37 | 5 days | |
| 14I18NPSM | 14 | 18 | £32.37 | In Stock | |
| 21E11.5NPSM Viewing | 21 | 11.5 | £43.03 | 5 days | |
| 21E14NPSM | 21 | 14 | £43.03 | 5 days | |
| 21I11.5NPSM | 21 | 11.5 | £35.22 | In Stock | |
| 21I14NPSM | 21 | 14 | £43.03 | 5 days | |
| 30E11.5NPSM | 30 | 11.5 | £58.99 | 5 days | |
| 30E8NPSM | 30 | 8 | £58.99 | 5 days | |
| 30I11.5NPSM | 30 | 11.5 | £58.99 | 5 days | |
| 30I8NPSM | 30 | 8 | £58.99 | 5 days | |
| 40E11.5NPSM | 40 | 11.5 | £102.05 | 5 days | |
| 40E8NPSM | 40 | 8 | £102.05 | 5 days | |
| 40I11.5NPSM | 40 | 11.5 | £102.05 | 5 days |
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