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16EL27UNK20 - 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 | 27 |
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Description
The Carmex Thread Turning External Insert is a left‑hand, external threading tool crafted to cover UNC, UNF, UNEF, and UNS thread standards with a single, reliable insert. Its industry‑leading range of laydown triangular inserts is designed to deliver consistent results across a wide variety of external threading tasks, from simple jobs to demanding productions.
Ideal for engineers, operators, and workshop professionals, the 16EL27UNK20 model provides a versatile, ready‑to‑use solution for external thread turning that helps you complete more work with fewer inserts.
- Broad thread‑standard compatibility: One insert supports UNC, UNF, UNEF, and UNS external threads, reducing the number of tools you need on hand and speeding setup.
- Left‑hand threading ready: Specifically designed for left‑hand external threads, ensuring accurate starts and reliable cutting performance.
- Versatile for a wide range of applications: The laydown triangular geometry is optimized for stable engagement across both basic and demanding thread‑turning jobs.
With the Carmex Thread Turning External Insert, you gain a single, adaptable tool that covers multiple thread standards and left‑hand operations. This reduces setup time, minimizes tool changes, and helps you achieve consistent thread form across jobs—whether you’re finishing simple tasks or tackling challenging threads in production.
Part Numbers
- Protool Part Number
- 16EL27UNK20
- 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.
