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08IL20UNBXC - Carmex Thread Turning Internal Insert - UN (UNC,UNF,UNEF,UNS) - Left Hand
| Thread Type | Internal |
| Thread Direction | Left Hand |
| Thread Form | UN (UNC UNF UNEF UNS) |
| Pitch | 20 |
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Description
The Carmex Thread Turning Internal Insert is a left-hand, internal threading insert designed to form UNC, UNF, UNEF, and UNS threads in bores and housings. It belongs to our industry-leading line of thread turning inserts and is built to handle a broad range of thread standards with consistent results. This laydown triangular design delivers reliable performance across a wide spectrum of applications, from simple threading tasks to more demanding jobs.
- Broad thread-standards compatibility: Works with UNC, UNF, UNEF, and UNS internal threads, reducing the need for multiple inserts and tool changes while delivering dependable results across common thread forms.
- Rigid triangular laydown geometry: Provides stable cutting action, minimizes vibration, and helps produce clean, consistent threads with fewer passes.
- Left-hand design for flexible setups: Specifically engineered for left-handed threading operations, enabling easy integration with standard CNC or manual machines and faster setup changes.
Designed to streamline internal threading workflows, this insert enables reliable performance across a wide range of UN thread forms in a variety of materials. Its versatile compatibility, stable cutting geometry, and left-hand orientation help reduce downtime, simplify tool management, and deliver consistently high-quality threaded features on every job.
Part Numbers
- Protool Part Number
- 08IL20UNBXC
- 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.

