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Carmex Thread Turning Internal Insert - American Butress - Right Hand - 11IR16ABUTK20
| Thread Type | Internal |
| Thread Direction | Right Hand |
| Thread Form | American Butress |
| Pitch | 16 |
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The Carmex Thread Turning Internal Insert, American Butress, Right Hand, 11IR16ABUTK20 is designed for internal threading with versatile, all‑in‑one capability. It’s a reliable choice for machinists, engineers, and hobbyists who work across a wide range of thread standards.
- Broad thread standard coverage: Built to provide a solution for the majority of thread standards in use today, reducing the need to stock multiple inserts and speeding up setup.
- Laydown triangular geometry for stable cutting: The high‑quality laydown triangular insert design delivers stable engagement and smooth chip flow, enabling consistent internal threads from basic to demanding applications.
- Right‑hand internal threading optimization: Specifically tuned for right‑hand threads, delivering predictable engagement and reliable results across common production tasks.
This insert helps you complete internal threaded components efficiently, maintaining steady workflow and improving overall productivity. With its broad compatibility and proven geometry, you can tackle a wide range of threading tasks with confidence, whether you’re performing routine maintenance or demanding precision work.
Part Numbers
- Protool Part Number
- 11IR16ABUTK20
- 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.



