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16ER18UNK20 - Carmex Thread Turning External Insert - UN (UNC,UNF,UNEF,UNS) - Right Hand
| Thread Type | External |
| Thread Direction | Right Hand |
| Thread Form | UN (UNC UNF UNEF UNS) |
| Pitch | 18 |
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Description
Carmex Thread Turning External Insert is a precision cutting insert designed for external thread turning on lathes and turning centers. Built to cover a wide range of thread standards, it delivers reliable, repeatable results across UNC, UNF, UNEF, and UNS specifications. This Right-Hand insert, model 16ER18UNK20, features a laydown triangular geometry that promotes stable cutting action and smooth chip flow for consistent thread quality.
- Extensive thread compatibility: Covers UNC, UNF, UNEF, and UNS external threads, minimizing tool changes and speeding up setup so you can move from one job to the next with confidence.
- Triangular laydown geometry for stable cutting: Provides smooth chip evacuation, reduces vibration, and helps deliver a reliable thread profile across a variety of materials and applications.
- Right-Hand orientation for standard threading operations: Optimized for common lathe configurations, ensuring predictable cutting direction and straightforward integration into existing workflows.
This insert is designed to support both routine maintenance tasks and demanding production work, helping shops reduce downtime while maintaining accurate, repeatable thread results. With its broad compatibility and proven geometry, it’s a dependable choice for engineers, machinists, and maintenance technicians seeking consistent performance across multiple thread standards.
Part Numbers
- Protool Part Number
- 16ER18UNK20
- 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.
