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Carmex Thread Turning Internal and External Insert - UN (UNC,UNF,UNEF,UNS) - Neutral - 22UER/L4UNK20
| Thread Type | Internal and External |
| Thread Direction | Neutral |
| Thread Form | UN (UNC UNF UNEF UNS) |
| Pitch | 4 |
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Description
Carmex Thread Turning Internal and External Insert – UN (UNC, UNF, UNEF, UNS), Neutral, 22UER/L4UNK20 is a versatile threading insert designed for both internal and external threads. It sits in Carmex’s globally recognized range, offering a single, easy-to-source solution that covers the major UN thread standards for a broad set of jobs.
This insert is suitable for a wide audience—from engineers and machinists to buyers and technicians—and is built to handle a range of applications, from basic threading tasks to more demanding ones. Its neutral variant and laydown triangular geometry are designed to deliver reliable performance consistently across different materials and production needs.
- Wide UN thread compatibility: Covers UNC, UNF, UNEF, and UNS forms with a single insert family, simplifying stocking and reducing tool changes.
- Internal and external turning capability: Supports both inside- and outside-thread operations, enabling flexible use and faster setup.
- Triangular laydown design for broad applicability: The laydown geometry provides stable cutting engagement across a range of basic to demanding tasks, helping deliver consistent results.
By choosing this insert, you gain a universal threading solution that streamlines workflows, reduces tool changes, and helps maintain consistent thread quality across projects. It’s a reliable choice for shops needing to cover multiple UN thread standards with one versatile tool, improving productivity and throughput.
Part Numbers
- Protool Part Number
- 22UER/L4UNK20
- 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.
