Please log in here to access all benefits, including promotional discounts and faster checkouts.


Carmex Thread Turning External Insert - Metric - Left Hand - 22EL4.0ISOBMA
| Thread Type | External |
| Thread Direction | Left Hand |
| Thread Form | Metric |
| Pitch | 4 |
Learn more about Klarna
Compatible holders
The ones our customers buy most.Description
The Carmex Thread Turning External Insert, Metric, Left Hand, 22EL4.0ISOBMA, is part of Carmex's industry-leading range of thread turning inserts. These high-quality laydown triangular inserts are designed to provide a reliable solution for a wide range of metric left-hand threading tasks, covering the standards most shops encounter today.
Whether you’re tackling basic threading work or more demanding production runs, this insert offers versatile capability that addresses the majority of thread standards available today.
- Broad compatibility with metric left-hand threads and most thread standards: Enables a single insert to cover a wide range of threading tasks, reducing tool changes and simplifying procurement.
- Laydown triangular geometry for versatile threading: Supports straightforward setup and delivers reliable results across simple to challenging applications.
- Globally recognized quality and consistency: Provides dependable performance across materials and standards, helping you achieve repeatable results and build confidence in every job.
This insert helps you streamline workflows, cut setup and changeover time, and deliver consistent, high-quality thread finishes. By consolidating threading needs into a single, reliable tool, you can improve productivity and reduce rework across both small runs and larger production cycles.
Part Numbers
- Protool Part Number
- 22EL4.0ISOBMA
- 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 - ISO - Right/Left Hand
View full collection →You are viewing 22EL4.0ISOBMA. Click any other SKU to view its full details.
| Product SKU | Thread Type | Thread Direction | Thread Form | Pitch | Insert Size | Grade | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|---|
| 16EL0.35ISOBMA | External | Left Hand | Metric | 0.35 | 16 | BMA | £9.47 | 5 days | |
| 16EL0.45ISOBMA | External | Left Hand | Metric | 0.45 | 16 | BMA | £9.47 | 5 days | |
| 16EL0.4ISOBMA | External | Left Hand | Metric | 0.4 | 16 | BMA | £9.47 | 5 days | |
| 16EL0.5ISOBMA | External | Left Hand | Metric | 0.5 | 16 | BMA | £12.31 | 5 days | |
| 16EL0.6ISOBMA | External | Left Hand | Metric | 0.6 | 16 | BMA | £9.47 | 5 days | |
| 16EL0.75ISOBMA | External | Left Hand | Metric | 0.75 | 16 | BMA | £12.31 | 5 days | |
| 16EL0.7ISOBMA | External | Left Hand | Metric | 0.7 | 16 | BMA | £12.31 | 5 days | |
| 16EL0.8ISOBMA | External | Left Hand | Metric | 0.8 | 16 | BMA | £9.50 | 5 days | |
| 16EL1.0ISOBMA | External | Left Hand | Metric | 1 | 16 | BMA | £9.50 | In Stock | |
| 16EL1.25ISOBMA | External | Left Hand | Metric | 1.25 | 16 | BMA | £9.50 | 5 days | |
| 16EL1.5ISOBMA | External | Left Hand | Metric | 1.5 | 16 | BMA | £9.50 | 5 days | |
| 16EL1.75ISOBMA | External | Left Hand | Metric | 1.75 | 16 | BMA | £9.50 | 5 days | |
| 16EL2.0ISOBMA | External | Left Hand | Metric | 2 | 16 | BMA | £9.50 | 5 days | |
| 16EL2.5ISOBMA | External | Left Hand | Metric | 2.5 | 16 | BMA | £9.50 | In Stock | |
| 16EL3.0ISOBMA | External | Left Hand | Metric | 3 | 16 | BMA | £9.50 | 5 days | |
| 16EL3.5ISOBMA | External | Left Hand | Metric | 3.5 | 16 | BMA | £9.50 | In Stock | |
| 16ER0.25ISOBMA | External | Right Hand | Metric | 0.25 | 16 | BMA | £12.33 | In Stock | |
| 16ER0.35ISOBMA | External | Right Hand | Metric | 0.35 | 16 | BMA | £12.31 | 5 days | |
| 16ER0.45ISOBMA | External | Right Hand | Metric | 0.45 | 16 | BMA | £12.31 | 5 days | |
| 16ER0.4ISOBMA | External | Right Hand | Metric | 0.4 | 16 | BMA | £12.31 | In Stock | |
| 16ER0.5ISOBMA | External | Right Hand | Metric | 0.5 | 16 | BMA | £12.31 | In Stock | |
| 16ER0.6ISOBMA | External | Right Hand | Metric | 0.6 | 16 | BMA | £12.31 | 5 days | |
| 16ER0.75ISOBMA | External | Right Hand | Metric | 0.75 | 16 | BMA | £12.31 | 5 days | |
| 16ER0.7ISOBMA | External | Right Hand | Metric | 0.7 | 16 | BMA | £12.31 | In Stock | |
| 16ER0.8ISOBMA | External | Right Hand | Metric | 0.8 | 16 | BMA | £9.50 | In Stock | |
| 16ER1.0ISOBMA | External | Right Hand | Metric | 1 | 16 | BMA | £9.50 | In Stock | |
| 16ER1.25ISOBMA | External | Right Hand | Metric | 1.25 | 16 | BMA | £9.50 | In Stock | |
| 16ER1.5ISOBMA | External | Right Hand | Metric | 1.5 | 16 | BMA | £9.50 | In Stock | |
| 16ER1.75ISOBMA | External | Right Hand | Metric | 1.75 | 16 | BMA | £9.50 | In Stock | |
| 16ER2.0ISOBMA | External | Right Hand | Metric | 2 | 16 | BMA | £9.50 | In Stock | |
| 16ER2.5ISOBMA | External | Right Hand | Metric | 2.5 | 16 | BMA | £9.50 | In Stock | |
| 16ER3.0ISOBMA | External | Right Hand | Metric | 3 | 16 | BMA | £9.50 | In Stock | |
| 16ER3.5ISOBMA | External | Right Hand | Metric | 3.5 | 16 | BMA | £9.50 | 5 days | |
| 22EL3.5ISOBMA | External | Left Hand | Metric | 3.5 | 22 | BMA | £13.93 | 5 days | |
| 22EL4.0ISOBMA Viewing | External | Left Hand | Metric | 4 | 22 | BMA | £13.93 | In Stock | |
| 22EL4.5ISOBMA | External | Left Hand | Metric | 4.5 | 22 | BMA | £13.93 | 5 days | |
| 22EL5.0ISOBMA | External | Left Hand | Metric | 5 | 22 | BMA | £13.93 | In Stock | |
| 22EL5.5ISOBMA | External | Left Hand | Metric | 5.5 | 22 | BMA | £13.93 | 5 days | |
| 22EL6.0ISOBMA | External | Left Hand | Metric | 6 | 22 | BMA | £10.69 | 5 days | |
| 22ER3.5ISOBMA | External | Right Hand | Metric | 3.5 | 22 | BMA | £13.93 | In Stock | |
| 22ER4.0ISOBMA | External | Right Hand | Metric | 4 | 22 | BMA | £13.93 | In Stock | |
| 22ER4.5ISOBMA | External | Right Hand | Metric | 4.5 | 22 | BMA | £13.93 | In Stock | |
| 22ER5.0ISOBMA | External | Right Hand | Metric | 5 | 22 | BMA | £13.93 | In Stock | |
| 22ER5.5ISOBMA | External | Right Hand | Metric | 5.5 | 22 | BMA | £13.93 | In Stock | |
| 22ER6.0ISOBMA | External | Right Hand | Metric | 6 | 22 | BMA | £13.93 | 5 days |
No products match your filters.



