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11IR0.4ISOK20 - Carmex Thread Turning Internal Insert - Metric - Right Hand
| Thread Type | Internal |
| Thread Direction | Right Hand |
| Thread Form | Metric |
| Pitch | 0.4 |
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Carmex Thread Turning Internal Insert – Metric – Right Hand – 11IR0.4ISOK20 is a high-performance cutting insert designed for internal thread turning. Built for metric threads and right-hand operations, it’s a versatile choice for shops, engineers, and hobbyists who demand reliable, consistent threading results.
Its laydown triangular geometry is optimized to cover a wide range of thread standards, providing dependable performance from simple, everyday jobs to more demanding threading tasks.
- Broad thread compatibility: Designed to cover the majority of thread standards in use today, reducing tool changes and keeping production moving.
- Stable cutting and efficient chip control: The laydown triangular geometry delivers stable cutting action and smooth chip evacuation for clean, consistent internal threads.
- Versatile for basic to demanding applications: Ready to handle a wide spectrum of threading tasks, from quick repairs to precision production runs.
By choosing this insert, you gain a reliable, precise option for metric internal threads that helps shorten cycle times, reduce setup complexity, and deliver repeatable results across a broad range of projects.
Part Numbers
- Protool Part Number
- 11IR0.4ISOK20
- 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.



