Please log in here to access all benefits, including promotional discounts and faster checkouts.


Carmex Thread Turning External Insert - NPTF - Right Hand - 16ER11.5NPTFK20
| Thread Type | External |
| Thread Direction | Right Hand |
| Thread Form | NPTF |
| Pitch | 11.5 |
| Insert Size | 16 |
| Grade | K20 |
Learn more about Klarna
Carmex Thread Turning External Insert - NPTF - Right Hand - 16ER11.5NPTFK20 is part of our industry-leading line of thread turning inserts. Worldwide recognition among professionals in machining, fabrication, and maintenance confirms its reliability for external threading tasks.
These high-quality laydown triangular inserts are designed to cover the majority of thread standards in today’s shops, delivering consistent, repeatable results from basic to demanding applications.
- Wide thread compatibility: The laydown triangular design is built to cover the majority of thread standards in use today, helping you complete diverse threading projects with a single reliable insert and reducing tool changes.
- Stable cutting geometry: Laydown triangular inserts provide solid support and steady chip control, delivering smoother cuts and consistent thread profiles even under tougher material conditions.
- Proven reliability across tasks: From simple external threads to more challenging applications, these inserts maintain predictable performance, reducing downtime and boosting overall productivity.
With Carmex, you gain a standard you can trust across multiple jobs: fewer insert changes, more consistent thread quality, and a straightforward setup that helps you meet tight deadlines. Ideal for engineers, buyers, tradespeople, hobbyists, and DIY machinists alike, this insert supports efficient workflows and durable results on external threading tasks.
| Thread Type | External |
| Thread Direction | Right Hand |
| Thread Form | NPTF |
| Pitch | 11.5 |
| Insert Size | 16 |
| Grade | K20 |
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.