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16ER28UNK20 - Carmex Thread Turning External Insert - UN (UNC,UNF,UNEF,UNS) - Right Hand
| Thread Type | External |
| Thread Direction | Right Hand |
| Thread Form | UN (UNC UNF UNEF UNS) |
| Pitch | 28 |
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Description
The Carmex Thread Turning External Insert is designed for turning external threads to UNC, UNF, UNEF, and UNS standards. It is a right-hand insert identified by the model code 16ER28UNK20, built for reliability in everyday machining and production environments.
These laydown triangular inserts are crafted to cover the majority of thread standards used today, making them suitable from basic threading tasks to more demanding finishing jobs without needing multiple tools.
- Broad UNC/UNF/UNEF/UNS compatibility: Turns external threads across the most common UN thread standards with a single insert, simplifying setup and reducing tool changes.
- Right-hand external threading design: Optimized for right-handed threads, ensuring predictable cutting action and clean thread surfaces.
- Laydown triangular geometry for stability and life: Triangular laydown geometry provides stable engagement and extends insert life across a wide range of applications.
This insert helps streamline threading operations by offering broad compatibility in one tool, reducing tool changes and inventory. Its right-hand geometry and laydown triangular design deliver consistent, clean threads across basic to demanding tasks, improving part quality and reducing downtime. With this Carmex insert, shops gain reliable performance, predictable results, and a clear path to lower overall threading costs.
Part Numbers
- Protool Part Number
- 16ER28UNK20
- 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.
