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Carmex Carbide Threading Insert - Whitworth - TiAlN Coated - 40-8W
| Application | Threading |
| Thread Form | WHIT (BSW BSF BSP) |
| Internal or External | Internal & External |
| Insert Size | 40 |
| Pitch | 8 |
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The Carmex Carbide Threading Insert for Whitworth threads, TiAlN coated, model 40-8W is a precision tool designed for reliable, versatile threading in metalworking projects. Built for workshop use, it delivers consistent results across common Whitworth forms with durable coating and practical wear life.
- Length options: Five lengths spanning 12 mm to 40 mm to fit a range of hole depths and workpiece geometries.
- Material: Carbide insert for rigidity and stable cutting performance in demanding applications.
- Coating: TiAlN coating enhances wear resistance and enables higher cutting speeds and longer tool life.
- Thread form: Whitworth threading insert crafted to support Whitworth profiles with reliable geometry.
- Cutting edges: Double-sided design with two cutting edges (except for BSPT/NPT/NPTF/American Buttress/API RD variants) for extended usage before indexing.
- Internal/External capability: In many profiles, the same insert can machine both internal and external threads, reducing the need for multiple tools (with exceptions for ISO/UN/NPSM/UNJ/Acme).
- Pitches supported: Depending on length, can handle pitches from 0.5 mm (32 TPI) to 6.0 mm (4 TPI).
This insert is designed to deliver precise Whitworth thread results with durable wear life, thanks to its carbide substrate and TiAlN coating. The double-edged design helps minimize tool changes during a run, while the flexible length options and broad pitch range offer practical versatility for a variety of threading tasks in metalworking shops.
| Application | Threading |
| Thread Form | WHIT (BSW BSF BSP) |
| Internal or External | Internal & External |
| Insert Size | 40 |
| Pitch | 8 |
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 Carbide Threading Inserts - Whitworth - TiAlN Coated
View full collection →You are viewing 40-8W. Click any other SKU to view its full details.
| Product SKU | Insert Size | Pitch | Price | Stock | Order |
|---|---|---|---|---|---|
| 12-19W | 12 | 19 | £26.50 | In Stock | |
| 14-11W | 14 | 11 | £34.92 | In Stock | |
| 14-14W | 14 | 14 | £26.50 | In Stock | |
| 14-16W | 14 | 16 | £26.50 | In Stock | |
| 14-19W | 14 | 19 | £26.50 | In Stock | |
| 14-20W | 14 | 20 | £26.50 | In Stock | |
| 14-24W | 14 | 24 | £26.50 | In Stock | |
| 21-11W | 21 | 11 | £35.22 | In Stock | |
| 21-14W | 21 | 14 | £35.22 | In Stock | |
| 21-16W | 21 | 16 | £35.22 | In Stock | |
| 21-19W | 21 | 19 | £35.22 | In Stock | |
| 21-20W | 21 | 20 | £35.22 | In Stock | |
| 30-11W | 30 | 11 | £48.30 | In Stock | |
| 30-14W | 30 | 14 | £48.30 | In Stock | |
| 30-16W | 30 | 16 | £48.30 | In Stock | |
| 40-11W | 40 | 11 | £83.54 | 5 days | |
| 40-8W Viewing | 40 | 8 | £83.54 | 5 days |
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