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Carmex Thread Turning External Insert - UN (UNC,UNF,UNEF,UNS) - Right Hand - 27ER4.5UNK20
| Thread Type | External |
| Thread Direction | Right Hand |
| Thread Form | UN (UNC UNF UNEF UNS) |
| Pitch | 4.5 |
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Description
Carmex Thread Turning External Insert is designed for external threading on UNC, UNF, UNEF, and UNS standards. This right-hand insert belongs to our industry-leading range of thread turning inserts and is built as a laydown triangular insert for stability and efficiency.
It provides a versatile solution for a wide range of applications, from basic threading tasks to the most demanding jobs, helping you achieve consistent, dependable results with fewer tool changes.
- Broad thread-standard coverage: The insert handles UNC, UNF, UNEF, and UNS external threads, giving you one versatile tool for many jobs and reducing the need to stock multiple inserts.
- Triangular laydown design for stability: The laydown geometry provides robust support during cutting, helping deliver clean thread profiles and reliable performance across basic to demanding applications.
- Right-hand orientation for external threading: Optimized for right-hand threads, ensuring consistent engagement and predictable results in everyday production and repair work.
With this Carmex external insert, you can streamline threading workflows, cut setup times, and reduce rework by delivering consistent, accurate threads across a wide range of standards. The proven triangular laydown design combines durability with reliable cutting action, supporting steady productivity in both small shops and high-volume production environments.
Part Numbers
- Protool Part Number
- 27ER4.5UNK20
- 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.
