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16IR3.0ISOK20 - Carmex Thread Turning Internal Insert - Metric - Right Hand
| Thread Type | Internal |
| Thread Direction | Right Hand |
| Thread Form | Metric |
| Pitch | 3 |
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The Carmex Thread Turning Internal Insert – Metric – Right Hand – 16IR3.0ISOK20 is designed for precise internal thread turning, enabling reliable production of metric threads across standard forms. Its laydown triangular insert geometry is built to cover a wide range of thread standards used in today’s manufacturing environments, making it a practical choice for shops handling diverse jobs.
Ideal for engineers, machinists, and technicians, this insert provides reliable performance from routine maintenance tasks to complex, high-precision threading work, helping you achieve consistent thread quality with fewer insert changes.
- Broad thread-standards compatibility: Designed to cover the majority of internal thread standards in use today, reducing the need to stock multiple variants and speeding up changeovers.
- Stable laydown triangular geometry: The laydown triangular shape delivers solid support in the cut, enhances chip control, and simplifies indexing for repeatable internal threads.
- Durable, reliable performance across applications: Maintains sharp cutting edges through long production runs, delivering dependable results from basic to demanding threading tasks.
Choosing this Carmex insert helps you streamline internal threading workflows, improve first-pass success, and reduce downtime. With broad compatibility, stable cutting geometry, and consistent results, you can complete more parts faster and with greater confidence, whether you’re producing new components or repairing existing ones.
Part Numbers
- Protool Part Number
- 16IR3.0ISOK20
- 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.



