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Carmex Thread Turning External Insert - Metric - Left Hand - 16VEL0.5ISOBMA
| Thread Type | External |
| Thread Direction | Left Hand |
| Thread Form | Metric |
| Pitch | 0.5 |
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The Carmex Thread Turning External Insert - Metric - Left Hand - 16VEL0.5ISOBMA is a purpose-built cutting insert for external threading on metric sizes. Engineered to work with left-hand threads, it delivers predictable engagement, clean thread starts, and consistent results across a broad range of metric thread standards.
With a laydown triangular design, this insert seats securely in compatible tools, reducing chatter and improving surface finish on both simple and demanding jobs. Whether you’re setting up a quick production run or tackling precision threading, it helps you achieve reliable, repeatable results.
- Wide compatibility with metric thread standards: Designed to cover the majority of external metric threads, helping you thread a variety of targets with a single insert and reducing tool-change time and inventory needs.
- Laydown triangular geometry for stable cutting: The geometry supports secure seating, even edge wear, and excellent chip control, delivering smoother finishes and longer tool life with less vibration.
- Left-hand threading optimized: Specifically engineered for left-hand threads, ensuring accurate engagement and predictable results on every pass.
This insert is built to streamline threading workflows, minimize downtime, and deliver consistent thread quality across a wide range of applications. By combining broad compatibility, stable cutting performance, and left-hand threading optimization, it helps you finish jobs faster with confidence and fewer reworks.
Part Numbers
- Protool Part Number
- 16VEL0.5ISOBMA
- 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.



