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Carmex Thread Turning External Insert - NPT - Right Hand - 11ER18NPTK20
| Thread Type | External |
| Thread Direction | Right Hand |
| Thread Form | NPT |
| Pitch | 18 |
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Carmex Thread Turning External Insert - NPT - Right Hand is a high-quality external threading insert designed for turning NPT right-hand threads. It sits within an industry-leading range of thread turning inserts that is recognized worldwide, making it a trusted choice for shops, engineers, and production teams needing dependable threading performance.
These laydown triangular inserts are designed to provide a solution for the majority of thread standards available today, covering a wide range of applications—from basic to demanding projects. They’re built to handle different threading needs with a single insert, helping streamline setup and reduce tool changes.
- Broad thread compatibility: Designed to deliver solutions for the majority of thread standards, enabling you to tackle a wide variety of threading jobs with a single insert.
- Proven, globally recognized quality: Part of an industry-leading range of thread turning inserts, offering reliable performance across many applications.
- Optimized for NPT right-hand external threads: Specifically shaped for external turning on NPT right-hand threads, enabling consistent, controllable cuts and accurate results.
This insert supports a straightforward, dependable threading workflow—helping you complete jobs more efficiently, reduce setup time, and achieve repeatable results across basic and more demanding threading tasks. Its established design and worldwide recognition give you confidence on the shop floor, whether you’re wiring up a single part or running high-volume production.
Part Numbers
- Protool Part Number
- 11ER18NPTK20
- Brand
- Carmex
- Category
- Thread Turning
Delivery
Free UK mainland delivery on orders over £50 ex VAT. In-stock items ordered before 4:30pm are dispatched the same working day. Full delivery information.
Returns
14-day returns on unused stock items in original packaging. Special-order and bespoke tooling is non-returnable. Read our returns policy.
Technical Support
Over 30 years of machining experience behind the counter. Call 01732 887334, Mon–Thurs 8:30–17:30, Fri 8:30–16:30.
Trade Accounts
Credit accounts, contract pricing and scheduled call-off orders available for trade customers. Apply for an account.
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.



