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11IR20UNK20 - Carmex Thread Turning Internal Insert - UN (UNC,UNF,UNEF,UNS) - Right Hand
| Thread Type | Internal |
| Thread Direction | Right Hand |
| Thread Form | UN (UNC UNF UNEF UNS) |
| Pitch | 20 |
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Carmex Thread Turning Internal Insert – Right Hand – UNC, UNF, UNEF, UNS (11IR20UNK20) is a versatile internal threading solution designed for a wide range of applications. Geared for professionals from engineers and buyers to tradespeople and hobbyists, this triable insert simplifies multi-standard threading with a single, reliable tool.
Our industry-leading range of thread turning inserts is recognized worldwide for consistency and performance. These laydown triangular inserts are engineered to cover the majority of thread standards in use today, making them suitable for everything from straightforward projects to the most demanding tasks.
- Universal thread compatibility (UNC, UNF, UNEF, UNS): a single insert that handles multiple thread standards, reducing inventory, simplifying setups, and delivering consistent results across common forms.
- Triangular laydown geometry for stability and control: the laydown design provides stable engagement, efficient chip control, and cleaner, more accurate threads even in challenging materials.
- Right-hand orientation for easy integration: optimized for standard right-handed turning operations, enabling quick setups and predictable tool paths in everyday workflows.
This insert supports efficient, reliable internal threading workflows by combining broad thread compatibility with stable cutting action and straightforward integration into common manufacturing setups. It helps you reduce tool changes, shorten setup times, and achieve consistent thread quality across a diverse range of parts and processes.
Part Numbers
- Protool Part Number
- 11IR20UNK20
- 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.



