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16ER2.5ISOK20 - Carmex Thread Turning External Insert - Metric - Right Hand
| Thread Type | External |
| Thread Direction | Right Hand |
| Thread Form | Metric |
| Pitch | 2.5 |
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The Carmex Thread Turning External Insert (Metric - Right Hand - 16ER2.5ISOK20) is a metric, right-hand cutting insert designed for external threading on workpieces. Its broad compatibility lets you tackle a wide range of thread standards with a single tool, helping you speed up setup and reduce tool changes on diverse jobs.
Ideal for engineers, machinists, toolmakers, and maintenance teams, this high-quality laydown triangular insert delivers reliable performance from simple to demanding threading tasks. Its robust design is built to perform in everyday workshop environments as well as busy production settings.
- Broad thread-standard compatibility: Covers the majority of thread standards in use today, so you can complete many threading tasks with one insert and minimize tool changes.
- Triangular laydown geometry for stability: The laydown triangular shape provides stable engagement and effective chip control across different thread profiles.
- Industry-leading quality and reliability: Recognized worldwide for high quality, these inserts are designed to deliver consistent performance across basic to demanding applications.
With this insert, you simplify your threading workflow: fewer tool changes, lower inventory requirements, and more predictable results across metric right-hand threads. The combination of universal compatibility and reliable performance helps you complete more work in less time while maintaining high accuracy and finish quality across a broad range of applications.
Part Numbers
- Protool Part Number
- 16ER2.5ISOK20
- 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.



