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Robert Charles Plain Shank Counterbore Standard Metric - M3.5
| Cap Screw Size | M3.5 |
| Pilot Size | 3.9 |
| Cutting Diameter | 6.5 |
| Shank Size | 5.0 |
| Overall Length | 71 |
Learn more about Klarna
Robert Charles Plain Shank Counterbore – Standard Metric (M3.5) is a precise countersinking tool built for machinists who require reliable, metric-sized hole preparation. Designed for compatibility with standard tool holders, it delivers stable cutting performance and clean, repeatable results across metalworking projects.
- Size & Standard: Metric M3.5 counterbore designed to match standard metric hole requirements for predictable drilling and finishing outcomes.
- Shank Type: Plain shank for straightforward mounting in common tool holders and collets, enabling quick setup and solid retention during cutting.
- Cutting Geometry: Precision-ground edges ensure clean, flat-bottom counterbores with minimal burr and consistent depth control.
- Compatibility: Suited for metric hole standards and versatile across milling machines, drill presses, and CNC setups in general engineering, automotive, and workshop environments.
- Durability & Finish: Robust construction with a smooth finish designed for repeatable performance in demanding shop conditions.
This counterbore helps you achieve accurate seating surfaces for metric fasteners and prepares holes with reliable depth and edge quality. The plain shank stabilizes the cut, reduces runout, and supports clean chip evacuation, contributing to faster setups, fewer reworks, and consistent results across projects. Ideal for engineers, technicians, and hobbyists who value precision, repeatability, and straightforward tool compatibility.
| Cap Screw Size | M3.5 |
| Pilot Size | 3.9 |
| Cutting Diameter | 6.5 |
| Shank Size | 5.0 |
| Overall Length | 71 |
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: Robert Charles Plain Shank Counterbores Standard Metric
View full collection →You are viewing 5760-M3.5. Click any other SKU to view its full details.
| Product SKU | Cap Screw Size | Pilot Size | Cutting Diameter | Shank Size | Overall Length | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|
| 5760-M3 | M3 | 3.4 | 6.0 | 5.0 | 71 | £40.29 | 2-3 days | |
| 5760-M3.5 Viewing | M3.5 | 3.9 | 6.5 | 5.0 | 71 | £40.29 | 2-3 days | |
| 5760-M4 | M4 | 4.5 | 8 | 5.0 | 71 | £42.66 | 2-3 days | |
| 5760-M5 | M5 | 5.5 | 10.0 | 8.0 | 80 | £44.24 | 2-3 days | |
| 5760-M6 | M6 | 6.4 | 11.0 | 8.0 | 80 | £47.40 | 2-3 days | |
| 5760-M8 | M8 | 9.0 | 15.0 | 12.5 | 100 | £61.62 | 2-3 days | |
| 5760-M10 | M10 | 11.0 | 18.0 | 12.5 | 100 | £77.42 | 2-3 days | |
| 5760-M12 | M12 | 14.0 | 20.0 | 12.5 | 100 | £87.69 | 2-3 days |
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