Please log in here to access all benefits, including promotional discounts and faster checkouts.
16IL8UNK20 - 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 | 8 |
Learn more about Klarna
Compatible holders
The ones our customers buy most.
Description
The Carmex Thread Turning Internal Insert (16IL8UNK20) is a precision tool for forming internal threads in metal parts. It is designed for left-handed threads and supports UNC, UNF, UNEF, and UNS standards, giving you a versatile solution for many common applications.
Part of Carmex's industry-leading range of laydown triangular inserts, it handles tasks from basic to demanding threads with consistent results.
- Wide thread compatibility: Covers UNC, UNF, UNEF, and UNS internal thread standards, so you can tackle diverse projects without swapping inserts.
- Left-hand threading support: Specifically designed for counterclockwise thread cuts, delivering reliable performance on left-handed threads and reducing setup time.
- Durable laydown triangular geometry: Stable cutting action and smooth chip flow for consistent thread quality and longer tool life, even on tougher materials.
This insert helps you streamline internal thread work by delivering consistent results across a broad range of standards, reducing tool changes and downtime. With reliable performance and straightforward setup, it supports faster project turnaround, better thread accuracy, and improved overall manufacturing efficiency.
Part Numbers
- Protool Part Number
- 16IL8UNK20
- 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.
