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16IR0.4ISOK20 - Carmex Thread Turning Internal Insert - Metric - Right Hand
| Thread Type | Internal |
| Thread Direction | Right Hand |
| Thread Form | Metric |
| Pitch | 0.4 |
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Description
The Carmex Thread Turning Internal Insert (Metric, Right Hand, 16IR0.4ISOK20) is a high‑quality insert designed for internal threading tasks. Its laydown triangular geometry provides stable cutting and consistent thread profiles across a wide range of materials.
This versatile insert is suitable for a broad audience—from engineers and machinists to technicians and hobbyists—and is capable of handling thread standards across basic and demanding applications with reliable performance.
- Broad thread compatibility: Designed to cover the majority of thread standards available today, reducing the need to stock multiple inserts and simplifying planning across mixed jobs.
- Stable, precise cutting with laydown geometry: The laydown triangular insert geometry promotes steady contact, minimizes chatter, and helps deliver clean, accurate thread profiles on a variety of materials.
- Durable and reliable performance: Built to withstand demanding threading tasks with consistent results, enabling longer tool life and lower downtime across a busy shop floor.
With its robust design and proven Carmex manufacturing quality, this internal thread turning insert helps you complete jobs faster, reduce tool changes, and achieve reliable, repeatable results. It supports efficient workflows, improves throughput, and delivers confidence in precision threading across a range of standards and materials.
Part Numbers
- Protool Part Number
- 16IR0.4ISOK20
- 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.
