Please log in here to access all benefits, including promotional discounts and faster checkouts.
Carmex Thread Turning External Insert - UN (UNC,UNF,UNEF,UNS) - Right Hand - 27ER4UNK20
| Thread Type | External |
| Thread Direction | Right Hand |
| Thread Form | UN (UNC UNF UNEF UNS) |
| Pitch | 4 |
| Insert Size | 27 |
| Grade | K20 |
Learn more about Klarna
Carmex Thread Turning External Insert - UN (UNC, UNF, UNEF, UNS) - Right Hand - 27ER4UNK20 is an external thread turning insert engineered for right-hand threads across UNC, UNF, UNEF, and UNS standards. It is part of our industry-leading range of thread turning inserts known worldwide for versatility and dependable performance.
The triangular laydown geometry supports efficient engagement and chip control across a broad range of materials, from everyday threading tasks to more demanding jobs.
- Broad thread standard compatibility: Designed to cover UNC, UNF, UNEF, and UNS external threads, this insert lets you tackle multiple thread forms with a single tool, reducing setup time and streamlining your shop’s tooling needs.
- Triangular laydown geometry for stable cutting: The laydown triangular design promotes smooth engagement and effective chip flow, helping deliver clean thread profiles with consistent results across various materials.
- Reliable performance for basic to demanding tasks: Built to handle a wide range of applications—from routine threading to more challenging jobs—providing steady tool life and dependable results over time.
This insert is a practical, all-in-one solution for shops and on-site teams that need reliable external threading across multiple standards. It supports a steady workflow, minimizes interruptions, and helps ensure consistent thread quality on every part.
| Thread Type | External |
| Thread Direction | Right Hand |
| Thread Form | UN (UNC UNF UNEF UNS) |
| Pitch | 4 |
| Insert Size | 27 |
| Grade | K20 |
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.
