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


Robet Charles Imperial Piloted Countersink - 3 Flutes Integral Pilot Straight Shank -5/32 Pilot Diameter - 100° Inclusive Angle - 5/16 Body Diameter
| Pilot Diameter | 5/32 |
| Inclusive Angle | 100 |
| Body Diameter | 5/16 |
| Shank Diameter | 3/16 |
Learn more about Klarna
Description
The Robet Charles Imperial Piloted Countersink – 3 Flute Integral Pilot Straight Shank is designed for accurate, repeatable countersinking of pre-drilled holes. With a precision-ground integral pilot for perfect alignment and chatter-free cutting, it delivers a clean, professional finish across steel, aluminium, and plastics. The tool is built for both workshop and production environments and uses sizes that align with standard hole and fastener requirements: 5/32" pilot diameter, 100° included angle, and 5/16" body diameter.
- Integral pilot for precise alignment: The precision-ground integral pilot centers the countersink in pre-drilled holes, delivering accurate starts, reduced wandering, and chatter-free cutting for a cleaner finish.
- Three-flute, smooth-cut design: The 3-flute geometry provides stable cutting action, improved swarf evacuation, and consistent chip removal for fast, reliable countersinks in steel, aluminium, and plastics.
- Rugged, production-ready build with defined geometry: With a 5/32" pilot, 100° included angle, and 5/16" body diameter, this countersink delivers consistent depth and flush seating, minimizing rework and boosting productivity.
By choosing this countersink, you gain faster setup times, fewer defects, and a more professional look across assemblies. The integral pilot keeps holes true, the triple-flute design maintains smooth cutting, and the tool's durable construction stands up to busy workshop and production environments, helping your workflow stay on schedule and your results stay consistent.
Part Numbers
- Protool Part Number
- 5821
- Brand
- Robert Charles
- Category
- Countersinks
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: Robet Charles Imperial Piloted Countersinks - 3 Flutes Integral Pilot Straight Shank
View full collection →You are viewing 5821. Click any other SKU to view its full details.
| Product SKU | Pilot Diameter | Inclusive Angle | Body Diameter | Shank Diameter | Overall Length | Shank Length | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|---|
| 5801 | 3/32 | 90 | 3/16 | 3/16 | 2.1/2 | 1.3/4 | £26.86 | 2-3 days | |
| 5805 | 3/32 | 90 | 1/4 | 3/16 | 2.1/2 | 1.3/4 | £27.65 | 2-3 days | |
| 5802 | 3/32 | 100 | 3/16 | 3/16 | 2.1/2 | 1.3/4 | £26.86 | 2-3 days | |
| 5806 | 3/32 | 100 | 1/4 | 3/16 | 2.1/2 | 1.3/4 | £30.02 | 2-3 days | |
| 5804 | 3/32 | 100 | 3/8 | 3/16 | 2.1/2 | 1.3/4 | £30.81 | 2-3 days | |
| 5803 | 3/32 | 120 | 3/16 | 3/16 | 2.1/2 | 1.3/4 | £26.86 | 2-3 days | |
| 5807 | 3/32 | 120 | 1/4 | 3/16 | 2.1/2 | 1.3/4 | £27.65 | 2-3 days | |
| 5809 | 1/8 | 90 | 1/4 | 3/16 | 2.1/2 | 1.3/4 | £27.65 | 2-3 days | |
| 5816 | 1/8 | 90 | 5/16 | 3/16 | 2.1/2 | 1.3/4 | £28.44 | 2-3 days | |
| 5825 | 1/8 | 90 | 3/8 | 3/16 | 2.1/2 | 1.3/4 | £30.81 | 2-3 days | |
| 5810 | 1/8 | 100 | 1/4 | 3/16 | 2.1/2 | 1.3/4 | £27.65 | 2-3 days | |
| 5817 | 1/8 | 100 | 5/16 | 3/16 | 2.1/2 | 1.3/4 | £29.23 | 2-3 days | |
| 5811 | 1/8 | 100 | 3/8 | 3/16 | 2.1/2 | 1.3/4 | £30.81 | 2-3 days | |
| 5812 | 1/8 | 120 | 1/4 | 3/16 | 2.1/2 | 1.3/4 | £27.65 | 2-3 days | |
| 5818 | 1/8 | 120 | 5/16 | 3/16 | 2.1/2 | 1.3/4 | £28.44 | 2-3 days | |
| 5826 | 1/8 | 120 | 3/8 | 3/16 | 2.1/2 | 1.3/4 | £30.81 | 2-3 days | |
| 5820 | 5/32 | 90 | 5/16 | 3/16 | 2.1/2 | 1.3/4 | £28.44 | 2-3 days | |
| 5827 | 5/32 | 90 | 3/8 | 3/16 | 2.1/2 | 1.3/4 | £30.81 | 2-3 days | |
| 5821 Viewing | 5/32 | 100 | 5/16 | 3/16 | 2.1/2 | 1.3/4 | £28.44 | 2-3 days | |
| 5823 | 5/32 | 100 | 3/8 | 3/16 | 2.1/2 | 1.3/4 | £30.81 | 2-3 days | |
| 5822 | 5/32 | 120 | 5/16 | 3/16 | 2.1/2 | 1.3/4 | £28.44 | 2-3 days | |
| 5828 | 5/32 | 120 | 3/8 | 3/16 | 2.1/2 | 1.3/4 | £30.81 | 2-3 days | |
| 5830 | 3/16 | 90 | 3/8 | 3/16 | 2.1/2 | 1.3/4 | £30.81 | 2-3 days | |
| 5831 | 3/16 | 100 | 3/8 | 3/16 | 2.1/2 | 1.3/4 | £30.81 | 2-3 days | |
| 5832 | 3/16 | 120 | 3/8 | 3/16 | 2.1/2 | 1.3/4 | £30.81 | 2-3 days | |
| 5834 | 3/16 | 120 | 7/16 | 3/16 | 2.1/2 | 1.3/4 | £33.97 | 2-3 days | |
| 5835 | 7/32 | 90 | 7/16 | 3/16 | 2.1/2 | 1.3/4 | £33.97 | 2-3 days | |
| 5837 | 7/32 | 100 | 7/16 | 3/16 | 2.1/2 | 1.3/4 | £33.97 | 2-3 days | |
| 5838 | 7/32 | 120 | 7/16 | 3/16 | 2.1/2 | 1.3/4 | £33.97 | 2-3 days | |
| 5840 | 1/4 | 90 | 7/16 | 3/16 | 2.1/2 | 1.3/4 | £33.97 | 2-3 days | |
| 5843 | 1/4 | 90 | 1/2 | 3/16 | 2.1/2 | 1.3/4 | £36.34 | 2-3 days | |
| 5841 | 1/4 | 100 | 7/16 | 3/16 | 2.1/2 | 1.3/4 | £33.97 | 2-3 days | |
| 5839 | 1/4 | 100 | 1/2 | 3/16 | 2.1/2 | 1.3/4 | £36.34 | 2-3 days | |
| 5842 | 1/4 | 120 | 7/16 | 3/16 | 2.1/2 | 1.3/4 | £33.97 | 2-3 days | |
| 5844 | 1/4 | 120 | 1/2 | 3/16 | 2.1/2 | 1.3/4 | £36.34 | 2-3 days |
No products match your filters.