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Carmex Thread Turning External Insert - NPT - Left Hand - 11EL27NPTBMA
| Thread Type | External |
| Thread Direction | Left Hand |
| Thread Form | NPT |
| Pitch | 27 |
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Carmex Thread Turning External Insert – NPT – Left Hand is a high-performance cutting insert designed for external threading on left-hand NPT threads. Part of Carmex's industry-leading thread turning range, these laydown triangular inserts are built to cover the majority of thread standards in use today, helping shops achieve precise threads with fewer tool changes.
Whether you’re performing routine maintenance or demanding production work, this insert delivers reliable results across a broad range of threading tasks, making it a dependable choice for engineers, machinists, and maintenance technicians alike.
- Broad thread standard compatibility: These inserts are designed to cover a wide range of thread standards, reducing tool changes and boosting uptime.
- Stable, efficient cutting with laydown triangular geometry: The geometry promotes smooth engagement and predictable cuts, helping you achieve clean thread profiles and consistent results.
- Versatile for basic to demanding tasks: From simple repairs to high-demand production threading, this insert maintains reliable performance across a variety of applications.
With this Carmex external thread turning insert, you streamline your threading work: faster setup, fewer tool changes, and consistently accurate NPT left-hand threads. The robust design supports steady workflow, minimizes rework, and helps you deliver precise, reliable results across projects.
Part Numbers
- Protool Part Number
- 11EL27NPTBMA
- 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.



