Please log in here to access all benefits, including promotional discounts and faster checkouts.
16ER8UNK20 - 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 | 8 |
Learn more about Klarna
Compatible holders
The ones our customers buy most.
Description
The Carmex Thread Turning External Insert is a precision cutting insert designed for turning external threads. It’s compatible with UNC, UNF, UNEF, and UNS thread standards and oriented for right-hand threading, offering a versatile solution for a wide range of materials and applications. Model 16ER8UNK20.
Its laydown triangular geometry delivers stable engagement and efficient chip control, helping you achieve consistent thread profiles across both simple prototypes and demanding production runs.
- Laydown triangular geometry: Stable cutting action with excellent chip control that reduces vibration and promotes longer insert life for cleaner threads.
- Broad thread standard compatibility: Handles UNC, UNF, UNEF, and UNS external threads, simplifying setup and reducing the need for multiple inserts.
- Right-hand orientation and quality construction: Specifically designed for right-hand threads with tight tolerances and repeatable results across jobs.
This insert supports faster, more reliable threading work by combining universal compatibility with stable performance. It helps streamline tool changes, improve finish consistency, and keep production moving—from quick prototypes to larger runs—without sacrificing thread accuracy.
Part Numbers
- Protool Part Number
- 16ER8UNK20
- 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.
