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16IR16UN2MK20 - 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 | 16 |
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Description
The Carmex Thread Turning Internal Insert is a right-hand, UN-threading insert designed for internal threading on UNC, UNF, UNEF, and UNS standards. Its laydown triangular geometry delivers clean, precise thread profiles with consistent results across a broad range of materials.
Built to perform from simple to demanding applications, this insert is part of an industry-leading range recognized worldwide for reliability and long tool life.
- Broad UN-thread compatibility: Works with UNC, UNF, UNEF, and UNS internal threads, covering the most common standards to minimize tool changes and inventory.
- Durable laydown triangular geometry: Delivers stable cuts, efficient chip control, and long insert life for consistent thread quality across different materials.
- Easy setup for right-hand threading: Standardized dimensions (16IR16UN2MK20) enable quick mounting, repeatable results, and reduced downtime in busy production environments.
This insert enables efficient, high-precision internal threading with less tool swapping and fewer reworks, helping you accelerate setups, meet tight production schedules, and achieve consistent thread quality across batches. Its durable construction and broad UN-thread compatibility translate into reliable performance day after day, delivering smoother finishes and fewer interruptions in your machining workflow.
Part Numbers
- Protool Part Number
- 16IR16UN2MK20
- 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.
