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16EL18UNBLU - Carmex Thread Turning External Insert - UN (UNC,UNF,UNEF,UNS) - Left Hand
| Thread Type | External |
| Thread Direction | Left Hand |
| Thread Form | UN (UNC UNF UNEF UNS) |
| Pitch | 18 |
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Description
Carmex Thread Turning External Insert – UN (UNC, UNF, UNEF, UNS) – Left Hand, 16EL18UNBLU is a precision external threading insert designed for left-hand threads. It sits in Carmex's industry‑leading line of thread turning inserts and is engineered to cover a wide range of UN thread standards with a single, reliable tool.
These high‑quality laydown triangular inserts are built to handle applications from basic threading tasks to the most demanding ones, delivering consistent thread finishes and dependable performance across diverse materials.
- Broad UN thread compatibility: Supports UNC, UNF, UNEF, and UNS in a single insert, reducing tool changes and enabling reliable threading across common standards.
- Rugged triangular laydown geometry: Triangular, laydown design provides stable cutting action and clean thread finishes with controlled chip flow.
- Left-hand threading optimized: Specifically engineered for left-handed threads to streamline setup and ensure reliable engagement during machining.
By choosing this insert, you can simplify procurement and reduce setup time in mixed UN-thread work, while achieving consistent, accurate threads across a wide range of materials. The left-hand variant fits standard external turning holders and integrates smoothly into existing workflows, helping you improve throughput and reduce downtime.
Part Numbers
- Protool Part Number
- 16EL18UNBLU
- 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.
