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16IL14UNK20 - Carmex Thread Turning Internal Insert - UN (UNC,UNF,UNEF,UNS) - Left Hand
| Thread Type | Internal |
| Thread Direction | Left Hand |
| Thread Form | UN (UNC UNF UNEF UNS) |
| Pitch | 14 |
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The Carmex Thread Turning Internal Insert — Left Hand, UN (UNC, UNF, UNEF, UNS) is a high-quality, laydown triangular insert designed for internal thread turning. Specifically engineered to cover the UNC, UNF, UNEF, and UNS thread standards, it provides a versatile solution for a wide range of applications.
It sits within an industry-leading range that is recognized worldwide. These inserts are built to handle a broad spectrum of tasks—from basic threading jobs to the most demanding ones—delivering dependable performance across countless projects.
- Broad UN thread compatibility: Supports UNC, UNF, UNEF, and UNS in a single insert, helping you tackle diverse projects without swapping tools or carrying multiple inserts.
- Left-Hand threading capability: Specifically designed for left-handed thread turning, expanding your machining options and enabling versatile setups on a single tool.
- Durable laydown triangular design: Built for reliable performance across a wide range of applications, merging solid geometry with consistent cutting results.
This insert helps you streamline internal threading tasks, reduce tool changes, and maintain consistent results from simple repairs to more complex assemblies. With Carmex’s proven manufacturing quality backing every cut, you can approach projects with confidence, knowing you have a capable, reliable solution for UN thread standards.
Part Numbers
- Protool Part Number
- 16IL14UNK20
- 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.



