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Carmex Thread Turning Internal Insert - American Butress - Right Hand - 16IR16ABUTK20
| Thread Type | Internal |
| Thread Direction | Right Hand |
| Thread Form | American Butress |
| Pitch | 16 |
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The ones our customers buy most.Description
The Carmex Thread Turning Internal Insert (American Butress - Right Hand - 16IR16ABUTK20) is part of our industry-leading line of thread turning inserts. These laydown triangular inserts are designed to cover a broad range of thread standards with a single, reliable solution, simplifying internal threading across many jobs.
Built for both basic and demanding applications, this insert delivers consistent results and steady performance across materials and tolerances, helping you complete jobs faster with fewer tool changes.
- Broad thread-standards compatibility: Designed to cover the majority of thread standards available today, reducing the need for multiple inserts and simplifying setup for diverse projects.
- Durable laydown triangular geometry: The triangular, laydown design provides stable cutting action and wear resistance across a wide range of applications and materials.
- Optimized for American Butress Right-Hand threads: Specifically engineered for this thread form, delivering precise alignment and reliable, consistent internal threads.
With the Carmex Thread Turning Internal Insert, you gain a versatile, durable tool that streamlines internal threading workflows, minimizes downtime, and helps you achieve consistent thread quality across varied materials and standards.
Part Numbers
- Protool Part Number
- 16IR16ABUTK20
- 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.



