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16EL24UNJK20 - Carmex Thread Turning External Insert - UNJ (UNJC UNJF UNJEF UNJS) - Left Hand
| Thread Type | External |
| Thread Direction | Left Hand |
| Thread Form | UNJ (UNJC UNJF UNJEF UNJS) |
| Pitch | 24 |
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Description
Carmex Thread Turning External Insert - UNJ (UNJC UNJF UNJEF UNJS) Left Hand, 16EL24UNJK20 is part of our industry-leading range of thread turning inserts. These high-quality laydown triangular inserts are designed to cover the majority of thread standards in use today, delivering reliable performance across a wide range of applications—from basic to the most demanding threading tasks.
Whether you’re an engineer, machinist, buyer, tradesperson, or hobbyist, this left-hand insert provides a single versatile solution for multiple UNJ thread configurations. Its robust geometry supports consistent thread quality while reducing tool changes and inventory needs.
- Broad thread compatibility: Covers UNJ, UNJC, UNJF, and UNJS threads with one insert, reducing tool changes and simplifying stocking while ensuring dependable results across standards.
- Triangular laydown geometry: Delivers stable cutting action, improved chip control, and cleaner thread finish, contributing to longer tool life and fewer reworks.
- Left-hand threading readiness: Specifically designed for left-hand operations, enabling straightforward setup in common machines and delivering repeatable results in your workflows.
With the Carmex UNJ external insert, you gain a flexible, reliable tool that helps streamline threading tasks, reduce downtime, and improve consistency across batches. Its broad compatibility and enduring geometry support faster cycle times, fewer tool changes, and professional, repeatable thread quality on a wide range of materials and speeds.
Part Numbers
- Protool Part Number
- 16EL24UNJK20
- 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.
