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16IL18UNBLU - 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 | 18 |
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Description
Carmex Thread Turning Internal Insert is a high‑quality cutting insert designed to produce internal threads to UNC, UNF, UNEF, and UNS standards. This left‑hand version is ideal for machinists, engineers, fabricators, and hobbyists who need reliable performance across a wide range of threading tasks—from routine repairs to production work.
Built around a laydown triangular geometry, the insert delivers stable cutting action, consistent thread quality, and long tool life. Its design is aimed at minimizing setup time and reducing tool changes, so you can complete more jobs with confidence.
- Broad thread compatibility across UNC/UNF/UNEF/UNS: Works with multiple internal thread standards, reducing tool changes and simplifying setups for diverse tasks.
- Left-hand threading readiness: Specifically designed for left‑hand internal threads, delivering reliable results on reverse‑thread applications.
- Durable triangular laydown geometry: Robust geometry provides stable cutting action, even wear resistance, and extended tool life across a range of materials.
This insert helps you streamline threading workflows by combining versatility, reliability, and long service life into a single, easy‑to‑use tool. By supporting multiple thread standards and left‑hand applications, it reduces inventory complexity and downtime while delivering dependable, repeatable internal‑thread quality—so you complete jobs faster with fewer reworks and greater confidence in every cut.
Part Numbers
- Protool Part Number
- 16IL18UNBLU
- 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.
