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16EL24UNK20 - 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 | 24 |
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Description
The Carmex Thread Turning External Insert - UN (UNC, UNF, UNEF, UNS) - Left Hand - 16EL24UNK20 is a high-performance threading insert designed for external threads on the major Unified thread standards. This left-hand version ensures clean, accurate cuts in left-handed threading applications.
As part of Carmex’s industry‑leading range, these high‑quality laydown triangular inserts offer broad compatibility across today’s thread standards and are engineered to handle a wide range of applications—from basic threading tasks to the most demanding ones.
- Broad thread-standards compatibility (UNC/UNF/UNEF/UNS): One insert covers external threads across the major Unified standards, reducing tool changes and simplifying inventory management.
- Laydown triangular design for stable cutting: The laydown geometry engages the thread profile smoothly, delivering steady cutting, consistent thread quality, and reduced vibration across a variety of conditions.
- Versatile for basic to demanding applications: Built to handle simple threading jobs and more challenging profiles with reliable performance, helping you complete tasks efficiently with fewer insert changes.
This combination of broad compatibility, robust geometry, and proven performance helps you complete external threading tasks more efficiently, reduces setup time, and delivers consistent, high-quality threads across projects.
Part Numbers
- Protool Part Number
- 16EL24UNK20
- 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.
