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16IR10UNK20 - Carmex Thread Turning Internal Insert - UN (UNC,UNF,UNEF,UNS) - Right Hand
| Thread Type | Internal |
| Thread Direction | Right Hand |
| Thread Form | UN (UNC UNF UNEF UNS) |
| Pitch | 10 |
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Carmex Thread Turning Internal Insert – Right Hand – UN (UNC, UNF, UNEF, UNS) – 16IR10UNK20 is an industry-leading internal thread insert designed to cover a wide range of UN thread standards. Its laydown triangular geometry delivers efficient, stable cutting for both simple and demanding threading tasks, helping you achieve clean, accurate threads with minimal rework.
Designed for engineers, machinists, and shop-floor professionals, this insert offers versatile performance in a compact, easy-to-use form. The 16IR10UNK20 configuration indicates its right-hand orientation and UN compatibility, making it a reliable choice for varied projects without the need for multiple tool types.
- Wide UN thread compatibility: Compatible with UNC, UNF, UNEF, and UNS internal threads, reducing the need for multiple inserts and simplifying your tooling inventory.
- Stable laydown triangular geometry: Delivers smooth entry and controlled cutting, producing consistent thread quality with less rework.
- Right-hand threading orientation: Specifically optimized for right-hand internal threads, ensuring reliable performance across common UN standards.
This insert helps you complete internal threading tasks efficiently, with reliable results across a range of materials and applications. Its UN compatibility and durable geometry support faster setups, fewer tool changes, and consistently finished threads, empowering you to meet production targets with confidence.
Part Numbers
- Protool Part Number
- 16IR10UNK20
- 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.



