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Carmex Thread Turning External Insert - UN (UNC,UNF,UNEF,UNS) - Right Hand - 16ER20UN2MBMA
| Thread Type | External |
| Thread Direction | Right Hand |
| Thread Form | UN (UNC UNF UNEF UNS) |
| Pitch | 20 |
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Description
The Carmex Thread Turning External Insert for UN (UNC, UNF, UNEF, UNS) threads is a versatile right-hand, laydown triangular insert designed for external threading tasks. It’s built to cover a broad range of thread standards, making it suitable for engineers, machinists, buyers, tradespeople, and hobbyists who need consistent performance across basic to demanding jobs.
Its laydown triangular geometry supports reliable cutting action and clean thread formation across UNC, UNF, UNEF, and UNS applications, helping you complete external threading tasks with confidence and ease.
- Universal UN-thread compatibility: Fits UNC, UNF, UNEF, and UNS external threads, enabling you to tackle a wide variety of jobs with a single insert.
- Laydown triangular geometry for consistent cutting: The geometry promotes stable engagement, efficient chip control, and smooth thread formation across basic to demanding applications.
- Right-Hand orientation for predictable results: Specifically designed for standard external threading directions, delivering reliable cuts and reproducible finishes every pass.
This insert simplifies tooling decisions, reduces changeovers, and supports steady throughput. By covering multiple UN thread standards in one tool, you can improve workflow efficiency, maintain consistent thread quality, and complete projects with fewer inserts and less downtime.
Part Numbers
- Protool Part Number
- 16ER20UN2MBMA
- 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.
Full Range: Carmex Thread Turning External Inserts - Multitooth - Unified - Right Hand
View full collection →You are viewing 16ER20UN2MBMA. Click any other SKU to view its full details.
| Product SKU | Thread Type | Thread Direction | Thread Form | Pitch | Insert Size | Grade | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|---|
| 16ER12UN2MBMA | External | Right Hand | UN (UNC UNF UNEF UNS) | 12 | 16 | BMA | £17.80 | 5 days | |
| 16ER14UN2MBMA | External | Right Hand | UN (UNC UNF UNEF UNS) | 14 | 16 | BMA | £13.68 | 5 days | |
| 16ER16UN2MBMA | External | Right Hand | UN (UNC UNF UNEF UNS) | 16 | 16 | BMA | £17.80 | 5 days | |
| 16ER18UN2MBMA | External | Right Hand | UN (UNC UNF UNEF UNS) | 18 | 16 | BMA | £13.68 | 5 days | |
| 16ER20UN2MBMA Viewing | External | Right Hand | UN (UNC UNF UNEF UNS) | 20 | 16 | BMA | £13.68 | 5 days | |
| 22ER12UN2MBMA | External | Right Hand | UN (UNC UNF UNEF UNS) | 12 | 22 | BMA | £21.67 | 5 days | |
| 22ER12UN3MBMA | External | Right Hand | UN (UNC UNF UNEF UNS) | 12 | 22 | BMA | £21.67 | 5 days | |
| 22ER13UN3MBMA | External | Right Hand | UN (UNC UNF UNEF UNS) | 13 | 22 | BMA | £21.67 | 5 days | |
| 22ER16UN3MBMA | External | Right Hand | UN (UNC UNF UNEF UNS) | 16 | 22 | BMA | £21.67 | 5 days | |
| 27ER8UN2MBMA | External | Right Hand | UN (UNC UNF UNEF UNS) | 8 | 27 | BMA | £36.81 | 5 days |
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