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Carmex Thread Turning External Insert - UNJ (UNJC UNJF UNJEF UNJS) - Right Hand - 16ER28UNJBLU
| Thread Type | External |
| Thread Direction | Right Hand |
| Thread Form | UNJ (UNJC UNJF UNJEF UNJS) |
| Pitch | 28 |
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The Carmex Thread Turning External Insert is engineered for precise external threading on components using UNJ thread standards. Built for right-handed threads, this insert covers the UNJ family (UNJC, UNJF, UNJEF, UNJS) with a single, versatile tool.
Ideal for machinists, engineers, and shop floor teams, it’s designed to handle a wide range of applications—from quick, basic Thread turning to the most demanding tasks—without swapping inserts.
- Broad UNJ compatibility: Supports UNJC, UNJF, UNJEF, and UNJS thread forms in right-hand configurations, reducing tool changes and simplifying inventory.
- Triangular laydown geometry: The laydown triangular design provides stable engagement and smooth chip flow for reliable thread formation across the UNJ range.
- Right-hand, universal application: Specifically optimized for external right-hand threading across the UNJ family, enabling consistent results across a variety of standard applications.
With a single insert that covers multiple UNJ standards and a geometry tuned for stable cutting, you can streamline workflows, reduce downtime, and achieve predictable, high-quality thread finishes. This creates a more efficient production cycle for shops handling diverse threading tasks, from routine maintenance to high-demand manufacturing runs.
Part Numbers
- Protool Part Number
- 16ER28UNJBLU
- 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.



