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16EL28UNK20 - 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 | 28 |
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Description
Carmex Thread Turning External Insert - UN (UNC,UNF,UNEF,UNS) - Left Hand - 16EL28UNK20 is a versatile thread turning insert designed for external threading operations. Its laydown triangular geometry provides a reliable solution for a broad range of thread standards, making it suitable for everything from simple to complex turns across UNC, UNF, UNEF, and UNS threads.
This insert is ideal for engineers, machinists, technicians, and workshops that need flexible, dependable tooling for both routine production and challenging threading tasks.
- Broad thread-standards compatibility: Covers UNC, UNF, UNEF, and UNS external threads, reducing the need for multiple tools and swaps.
- Left-hand threading capability: Specifically designed to support left-handed thread turning, enabling efficient machining in common applications.
- Durable triangular laydown geometry: Delivers reliable performance across a wide range of basic to demanding thread turning tasks.
By concentrating on versatility and dependable geometry, this insert helps you speed up setups, minimize tool changes, and maintain consistent thread quality across varying standards. The Carmex engineering behind this insert provides confidence for production planning, repairs, and busy workshop schedules.
Part Numbers
- Protool Part Number
- 16EL28UNK20
- 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.
