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Carmex Thread Turning Internal Insert - ACME - Right Hand - 16IR12ACMEK20
| Thread Type | Internal |
| Thread Direction | Right Hand |
| Thread Form | ACME |
| Pitch | 12 |
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Compatible holders
The ones our customers buy most.Description
The Carmex Thread Turning Internal Insert is a versatile tooling solution built for internal threading on ACME right-hand threads. Designed to work across a wide range of thread standards, it is well-suited for machine shops, engineers, buyers, tradespeople, hobbyists, and anyone needing reliable ACME threading capability. It helps you tackle everything from everyday tasks to more demanding applications with a single, dependable insert.
- Broad compatibility with thread standards: Covers the majority of common thread standards, enabling efficient internal threading across multiple profiles with one insert and reducing tool changes.
- Laydown triangular geometry for stable cuts: The laydown triangular design enhances chip control and cutting stability, delivering consistent thread quality and smoother finishes even on tough materials.
- Reliable performance across basic to demanding tasks: Engineered to maintain dependable results through a wide range of threading jobs, helping minimize downtime and extend tool life.
This insert supports efficient, repeatable internal threading workflows, making it easier to hit precise thread dimensions while keeping production moving. Its dependable design reduces rework, simplifies inventory, and gives you the confidence to complete ACME right-hand threading tasks consistently—whether in routine fabrication or more challenging projects.
Part Numbers
- Protool Part Number
- 16IR12ACMEK20
- 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.



