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16EL20UNJBMA - Carmex Thread Turning External Insert - UNJ (UNJC UNJF UNJEF UNJS) - Left Hand
| Thread Type | External |
| Thread Direction | Left Hand |
| Thread Form | UNJ (UNJC UNJF UNJEF UNJS) |
| Pitch | 20 |
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Description
Carmex Thread Turning External Insert is a versatile left-hand insert designed for external threading on UNJ standards. These high-quality laydown triangular inserts are engineered to cover the majority of thread standards in use today, enabling efficient turning from basic to demanding applications.
Designed for reliability in production environments, they deliver consistent results across a wide range of materials and threading tasks.
- Broad UNJ compatibility: Engineered to work with UNJ, UNJC, UNJF, UNJEF and UNJS external threads, this insert reduces tool changes and simplifies setups while delivering reliable performance across the UNJ family.
- Triangular laydown geometry for stability: Laydown geometry provides strong edge support, stable seating, and smooth chip flow to help maintain consistent thread quality on varied materials.
- Left-hand threading capability: Specifically configured for left-handed threads, this insert delivers reliable cutting action and predictable results in busy production environments.
With broad UNJ coverage, robust geometry, and left-hand configuration, this Carmex external insert helps you complete thread turning tasks efficiently, improves workflow, and supports consistent results across a range of applications.
Part Numbers
- Protool Part Number
- 16EL20UNJBMA
- 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.
