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Carmex Thread Turning External Insert - American Butress - Right Hand - 11ER20ABUTBMA
| Thread Type | External |
| Thread Direction | Right Hand |
| Thread Form | American Butress |
| Pitch | 20 |
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Description
Introducing the Carmex Thread Turning External Insert in the 11ER20ABUTBMA configuration. This right-hand external insert with American Butress geometry is part of our industry-leading thread turning family, designed for reliable performance across a wide range of thread standards. It’s an ideal choice for engineers, machinists, shops, and hobbyists who need fast, consistent external threading.
The laydown triangular insert is engineered for versatility—from basic threading tasks to demanding precision applications—supporting a broad spectrum of thread forms and materials. It helps you streamline setups and reduce tool changes, keeping production moving smoothly.
- Broad thread standard coverage: Delivers compatibility with the majority of thread standards, reducing tool changes and speeding up setup so you can complete more jobs in less time.
- Laydown triangular geometry for durability: Distributes cutting forces evenly for a smoother finish and longer tool life, cutting downtime and rework.
- Right-hand American Butress configuration: Optimized for right-hand threads, ensuring predictable chip flow and stable engagement with standard turning setups.
Choose the Carmex 11ER20ABUTBMA external insert to simplify threading workflows, extend tool life, and achieve consistent, high-quality thread profiles across a wide range of applications.
Part Numbers
- Protool Part Number
- 11ER20ABUTBMA
- 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.
