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Carmex Thread Turning External Insert - UNJ (UNJC UNJF UNJEF UNJS) - Right Hand - 16ER40UNJBMA
| Thread Type | External |
| Thread Direction | Right Hand |
| Thread Form | UNJ (UNJC UNJF UNJEF UNJS) |
| Pitch | 40 |
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The Carmex Thread Turning External Insert is a precision, right-hand triangular insert designed for external threading on lathes and turning centers. It supports UNJ thread forms—UNJC, UNJF, UNJEF, and UNJS—with the 16ER40UNJBMA configuration, delivering versatile performance across a wide range of standards.
Built for professional shops and serious hobbyists alike, this insert helps you streamline threading tasks with a single tool that covers multiple standards, reducing tool changes and setup time while delivering reliable, consistent results.
- Broad UNJ thread compatibility: Engineered to cover UNJC, UNJF, UNJEF, and UNJS external thread forms, letting you handle a wide range of projects without swapping inserts.
- Laydown triangular geometry for stable cutting: The laydown design promotes smooth engagement and steady chip flow, delivering consistent thread profiles and cleaner finishes across materials.
- Right-hand orientation for predictable performance: Specifically designed for right-hand threading, providing repeatable results and straightforward setup in standard turning operations.
Designed to help you deliver accurate threads faster, this insert supports efficient workflows, reduces downtime, and helps you achieve clean, repeatable thread forms across basic and demanding applications. Whether you’re producing standard fasteners or specialized components, you can rely on this Carmex insert to maintain consistency and confidence in every cut.
Part Numbers
- Protool Part Number
- 16ER40UNJBMA
- 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.
Full Range: Carmex Thread Turning External Inserts - UNJ - Right/Left Hand
View full collection →You are viewing 16ER40UNJBMA. Click any other SKU to view its full details.
| Product SKU | Thread Type | Thread Direction | Thread Form | Pitch | Insert Size | Grade | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|---|
| 16ER10UNJBMA | External | Right Hand | UNJ (UNJC UNJF UNJEF UNJS) | 10 | 16 | BMA | £12.06 | In Stock | |
| 16ER11UNJBMA | External | Right Hand | UNJ (UNJC UNJF UNJEF UNJS) | 11 | 16 | BMA | £12.06 | In Stock | |
| 16ER12UNJBMA | External | Right Hand | UNJ (UNJC UNJF UNJEF UNJS) | 12 | 16 | BMA | £12.06 | 5 days | |
| 16ER13UNJBMA | External | Right Hand | UNJ (UNJC UNJF UNJEF UNJS) | 13 | 16 | BMA | £12.06 | In Stock | |
| 16ER14UNJBMA | External | Right Hand | UNJ (UNJC UNJF UNJEF UNJS) | 14 | 16 | BMA | £12.06 | 5 days | |
| 16ER16UNJBMA | External | Right Hand | UNJ (UNJC UNJF UNJEF UNJS) | 16 | 16 | BMA | £12.06 | In Stock | |
| 16ER18UNJBMA | External | Right Hand | UNJ (UNJC UNJF UNJEF UNJS) | 18 | 16 | BMA | £12.06 | In Stock | |
| 16ER20UNJBMA | External | Right Hand | UNJ (UNJC UNJF UNJEF UNJS) | 20 | 16 | BMA | £12.06 | In Stock | |
| 16ER24UNJBMA | External | Right Hand | UNJ (UNJC UNJF UNJEF UNJS) | 24 | 16 | BMA | £12.06 | In Stock | |
| 16ER28UNJBMA | External | Right Hand | UNJ (UNJC UNJF UNJEF UNJS) | 28 | 16 | BMA | £12.06 | In Stock | |
| 16ER32UNJBMA | External | Right Hand | UNJ (UNJC UNJF UNJEF UNJS) | 32 | 16 | BMA | £12.06 | 5 days | |
| 16ER36UNJBMA | External | Right Hand | UNJ (UNJC UNJF UNJEF UNJS) | 36 | 16 | BMA | £15.71 | In Stock | |
| 16ER40UNJBMA Viewing | External | Right Hand | UNJ (UNJC UNJF UNJEF UNJS) | 40 | 16 | BMA | £15.71 | In Stock | |
| 16ER44UNJBMA | External | Right Hand | UNJ (UNJC UNJF UNJEF UNJS) | 44 | 16 | BMA | £15.71 | In Stock | |
| 16ER48UNJBMA | External | Right Hand | UNJ (UNJC UNJF UNJEF UNJS) | 48 | 16 | BMA | £15.71 | In Stock | |
| 16ER8UNJBMA | External | Right Hand | UNJ (UNJC UNJF UNJEF UNJS) | 8 | 16 | BMA | £12.06 | 5 days | |
| 16ER9UNJBMA | External | Right Hand | UNJ (UNJC UNJF UNJEF UNJS) | 9 | 16 | BMA | £12.06 | In Stock |
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