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Carmex Thread Turning External Insert - UN (UNC,UNF,UNEF,UNS) - Right Hand - 22ER12UN3MK20
| Thread Type | External |
| Thread Direction | Right Hand |
| Thread Form | UN (UNC UNF UNEF UNS) |
| Pitch | 12 |
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Description
The Carmex Thread Turning External Insert is a versatile cutting tool designed for external UN-thread turning (UNC, UNF, UNEF, UNS). Right-hand threading applications are supported, making it a practical choice for engineers, machinists, and maintenance teams who need one tool to cover multiple UN thread standards.
Its laydown triangular geometry promotes stable engagement and reliable, consistent thread forms across basic to demanding tasks.
- Broad UN thread compatibility: Works with UNC, UNF, UNEF, and UNS external threads, enabling you to tackle multiple standards with a single insert.
- Right-hand threading optimization: Specifically designed for external right-hand threads, delivering clean, accurate results across common materials.
- Robust laydown triangular geometry: Provides stable seating in holders and smooth cutting action, helping maintain accuracy and reduce downtime on challenging jobs.
Designed to simplify threading operations, this insert helps you speed setups, minimize tool changes, and consistently produce quality threads. The broad UN-thread coverage and dependable geometry support both routine maintenance tasks and high-volume production, so you can meet deadlines with confidence and reduce downtime.
Part Numbers
- Protool Part Number
- 22ER12UN3MK20
- 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.
