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


Carmex Thread Turning Internal Insert - W (BSW BSF BSP BSB) - Right Hand - 11IRB28WBMA
| Thread Type | Internal |
| Thread Direction | Right Hand |
| Thread Form | W (BSW BSF BSP BSB) |
| Pitch | 28 |
| Insert Size | 11 |
| Grade | BMA |
Learn more about Klarna
The Carmex Thread Turning Internal Insert is a versatile cutting tool designed for creating internal threads in metal components. It is engineered for right-hand threading and supports the major thread standards you’ll encounter, including BSW, BSF, BSP, and BSB, helping you work efficiently across mixed projects.
Its laydown triangular geometry provides stable cutting engagement and durable edges, delivering reliable performance from everyday tasks to more demanding threading jobs. The compact insert profile fits into tight bores and supports quick, confident setup.
- Broad thread-standard compatibility: Works with BSW, BSF, BSP, and BSB internal threads, reducing the need for multiple inserts and simplifying stock management.
- Right-hand cutting geometry: Optimized for right-handed internal threads, delivering consistent engagement and predictable, clean results.
- Robust laydown triangular design: Triangular geometry provides strong cutting edges and stable performance across a wide range of materials and thread sizes.
This combination translates to faster setup, fewer tool changes, and reliable, precise threads across a variety of applications—from simple bore fasteners to precision components. If you’re aiming for consistent thread quality and reduced downtime, this Carmex internal insert is a dependable choice for your workshop or production line.
| Thread Type | Internal |
| Thread Direction | Right Hand |
| Thread Form | W (BSW BSF BSP BSB) |
| Pitch | 28 |
| Insert Size | 11 |
| Grade | BMA |
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 Internal Inserts - BType - Whitworth - Right Hand
View full collection →You are viewing 11IRB28WBMA. Click any other SKU to view its full details.
| Product SKU | Thread Type | Thread Direction | Thread Form | Pitch | Insert Size | Grade | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|---|
| 11IRB14WBMA | Internal | Right Hand | W (BSW BSF BSP BSB) | 14 | 11 | BMA | £8.44 | 5 days | |
| 11IRB16WBMA | Internal | Right Hand | W (BSW BSF BSP BSB) | 16 | 11 | BMA | £8.59 | 5 days | |
| 11IRB18WBMA | Internal | Right Hand | W (BSW BSF BSP BSB) | 18 | 11 | BMA | £8.59 | 5 days | |
| 11IRB19WBMA | Internal | Right Hand | W (BSW BSF BSP BSB) | 19 | 11 | BMA | £8.59 | 5 days | |
| 11IRB20WBMA | Internal | Right Hand | W (BSW BSF BSP BSB) | 20 | 11 | BMA | £8.59 | 5 days | |
| 11IRB24WBMA | Internal | Right Hand | W (BSW BSF BSP BSB) | 24 | 11 | BMA | £8.59 | 5 days | |
| 11IRB28WBMA Viewing | Internal | Right Hand | W (BSW BSF BSP BSB) | 28 | 11 | BMA | £8.59 | 5 days | |
| 16IRB10WBMA | Internal | Right Hand | W (BSW BSF BSP BSB) | 10 | 16 | BMA | £8.44 | 5 days | |
| 16IRB11WBMA | Internal | Right Hand | W (BSW BSF BSP BSB) | 11 | 16 | BMA | £8.44 | 5 days | |
| 16IRB14WBMA | Internal | Right Hand | W (BSW BSF BSP BSB) | 14 | 16 | BMA | £8.44 | 5 days | |
| 16IRB16WBMA | Internal | Right Hand | W (BSW BSF BSP BSB) | 16 | 16 | BMA | £8.44 | 5 days | |
| 16IRB19WBMA | Internal | Right Hand | W (BSW BSF BSP BSB) | 19 | 16 | BMA | £8.44 | 5 days |
No products match your filters.