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Toolex HSS-E Piloted Counterbore Metric 180° - M4
| Metric Size | M4 |
| Cutter Diameter | 8 |
| Pilot Diameter | 4.3 |
| Overall Length | 71 |
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Description
The Toolex HSS-E Piloted Counterbore with a 180° cutting edge is built for precision-focused workshops and professional machinists who demand clean, flat-bottom recesses for metric fasteners. Designed around an M4 size, this tool delivers reliable alignment and consistent results in a variety of materials.
- Material: HSS-E (high-speed steel with cobalt) for enhanced strength, wear resistance, and heat tolerance during heavy-duty counterboring.
- Cutting Edge: 180° cutting edge creates flat-bottom, uniform counterbores for precise screw seating.
- Piloted Design: Integrated pilot ensures accurate alignment and stable guidance through the workpiece.
- Size: M4, suitable for standard metric fastener countersinking and seating applications.
- Durability: Cobalt-infused alloy maintains performance and edge retention in challenging materials.
- Applications: Ideal for creating clean recesses in metals and other machinable materials with repeatable depth control.
This counterbore is engineered to minimize chatter and rework, helping you achieve professional-quality finishes faster. The combination of HSS-E material and a precise piloted design translates into consistent depth, smooth walls, and reliable seating for M4 screws across a range of project work—from automotive components to metal enclosures and cabinetry hardware.
Part Numbers
- Protool Part Number
- L0031040AM
- Brand
- Toolex
- Category
- Counterbore
Need cutting data? Call 01732 887334 or email sales@protool-ltd.co.uk.
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: Toolex HSS-E Piloted Counterbore 180°
View full collection →You are viewing L0031040AM. Click any other SKU to view its full details.
| Product SKU | Metric Size | Cutter Diameter | Pilot Diameter | Overall Length | Shank Diameter | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|
| L0031010AM | M1 | 2.2 | 1.1 | 45 | 2.2 | £22.48 | In Stock | |
| L0031012AM | M1.2 | 2.5 | 1.3 | 45 | 2.5 | £22.48 | In Stock | |
| L0031014AM | M1.4 | 2.8 | 1.5 | 45 | 2.8 | £20.99 | In Stock | |
| L0031016AM | M1.6 | 3.3 | 1.7 | 56 | 3.3 | £20.99 | In Stock | |
| L0031017AM | M1.7 | 3.8 | 1.8 | 56 | 3.8 | £20.99 | In Stock | |
| L0031020AM | M2 | 4.3 | 2.2 | 56 | 4.3 | £20.99 | In Stock | |
| L0031025AM | M2.5 | 5 | 2.7 | 56 | 5 | £22.23 | In Stock | |
| L0031026AM | M2.6 | 5.5 | 2.8 | 71 | 5.5 | £22.23 | In Stock | |
| L0031030AM | M3 | 6 | 3.2 | 71 | 6 | £22.86 | In Stock | |
| L0031035AM | M3.5 | 6.5 | 3.7 | 71 | 6.5 | £22.86 | In Stock | |
| L0031040AM Viewing | M4 | 8 | 4.3 | 71 | 8 | £23.10 | In Stock | |
| L0031050AM | M5 | 10 | 5.3 | 80 | 10 | £26.25 | In Stock | |
| L0031060AM | M6 | 11 | 6.4 | 80 | 11 | £29.11 | In Stock | |
| L0031080AM | M8 | 15 | 8.4 | 100 | 12.5 | £38.40 | In Stock | |
| L0031100AM | M10 | 18 | 10.5 | 100 | 12.5 | £49.80 | In Stock | |
| L0031120AM | M12 | 20 | 13 | 100 | 12.5 | £67.32 | In Stock |
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