Please log in here to access all benefits, including promotional discounts and faster checkouts.
11IR20UNBLU - 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 |
Learn more about Klarna
Compatible holders
The ones our customers buy most.
Description
The Carmex Thread Turning Internal Insert is a precision cutting tool designed for internal threading on lathes and CNC machines. It supports UN thread standards—UNC, UNF, UNEF, and UNS—making it a versatile choice for shops that work with multiple thread profiles. The right-hand orientation and laydown triangular geometry promote stable cutting and consistent thread formation across a wide range of materials.
These inserts are part of Carmex’s industry-leading range and are engineered to handle applications from basic to demanding, providing a reliable solution across the majority of UN thread standards available today.
- Universal UN thread compatibility: One insert covers UNC, UNF, UNEF, and UNS, reducing tool changes and simplifying setup so you can thread a wide range of parts with a single, dependable insert.
- Laydown triangular geometry for stability: The triangular, laydown design delivers rigidity, efficient chip control, and a clean, consistent thread finish with longer insert life and smoother operation.
- Right‑hand internal threading design: Optimized for right-hand threading to ensure predictable cutting direction and repeatable thread profiles across different materials and applications.
This insert helps streamline machining workflows by reducing setup time and tool changes, delivering reliable internal threads across multiple standards, and improving finish quality. By simplifying tooling and increasing reliability, it minimizes downtime and rework, helping your shop meet tight production schedules with confidence in every pass.
Part Numbers
- Protool Part Number
- 11IR20UNBLU
- 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.
