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Robert Charles Plain Shank Counterbore Standard Metric - M4
| Cap Screw Size | M4 |
| Pilot Size | 4.5 |
| Cutting Diameter | 8 |
| Shank Size | 5.0 |
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Description
The Robert Charles Plain Shank Counterbore – Standard Metric (M4) is a precision cutting tool designed for accurate counterboring in metalworking and manufacturing. It features a plain shank for compatibility with standard tool holders, delivering reliable, repeatable results in metric hole applications.
- Plain shank design: Compatible with standard tool holders for quick setup and stable alignment.
- Metric size: Standard metric M4 configuration tailored to metric hole standards.
- Clean, precise counterboring: Geometry engineered to produce flat-bottom holes with smooth walls for accurate fastener seating.
- Reliable performance: Built for repeatability in demanding workshop environments.
- Versatile applications: Suitable for general engineering, automotive, and workshop tasks requiring precision and consistency.
Using this counterbore helps achieve well-defined counterbored features that improve nut and bolt seating, torque transfer, and joint integrity. The plain shank simplifies tooling setup and reduces runout, contributing to tighter tolerances and more consistent results across multiple parts. Ideal for technicians and hobbyists who value reliability and accuracy in metric hole standards.
Part Numbers
- Protool Part Number
- 5760-M4
- Brand
- Robert Charles
- 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: Robert Charles Plain Shank Counterbores Standard Metric
View full collection →You are viewing 5760-M4. 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 | M3.5 | 3.9 | 6.5 | 5.0 | 71 | £40.29 | 2-3 days | |
| 5760-M4 Viewing | 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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