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Carmex Thread Turning External Insert - Metric - Left Hand - 27EL5.5ISOBMA
| Thread Type | External |
| Thread Direction | Left Hand |
| Thread Form | Metric |
| Pitch | 5.5 |
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The ones our customers buy most.Description
Carmex Thread Turning External Insert (Metric, Left Hand) is part of an industry-leading family of thread turning inserts designed to tackle a wide range of metric thread standards. The triangular, laydown design is built to deliver reliable performance across a broad spectrum of threading tasks.
Ideal for workshops, engineers, and production environments, these inserts handle everything from basic thread cutting to more demanding applications, offering a single solution that reduces tool changes and simplifies inventory.
- Broad thread standard compatibility: Designed to cover the majority of metric thread standards in use today, providing a versatile, one-tool solution for many jobs.
- Left-hand threading capability: Specifically configured for left-hand external thread cuts, enabling clean, accurate threads with consistent results.
- Proven, industry-leading quality: Part of a globally recognized range known for reliability and performance across a range of applications, from simple to demanding.
This insert helps streamline your threading workflow by reducing tool changes and delivering consistent, ready-to-use threads across different standards. With a proven track record in diverse applications, it supports faster setup, predictable results, and less rework, helping you complete projects on time and with confidence.
Part Numbers
- Protool Part Number
- 27EL5.5ISOBMA
- 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.


