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Robert Charles DIN 3 Flute Countersink 90° - 5.3mm Head Diameter
| Head Diameter | 5.3 |
| Small Diameter | 1.5 |
| Shank Diameter | 4 |
| Overall Length | 40 |
| Head Length | 4 |
| Angle | 90 |
Learn more about Klarna
The Robert Charles DIN 3 Flute Countersink 90° is a precision cutting tool engineered to create accurate 90-degree countersinks and chamfers. Manufactured to DIN standards, it delivers reliable performance in engineering, maintenance, and production environments where precision matters.
With a 5.3 mm head diameter and a 3-flute design, this countersink provides smooth, stable cutting, reduced vibration, and efficient chip evacuation to deliver consistent, high-quality finishes across a range of materials including steels, aluminium, and plastics.
- DIN-standard precision: Delivers accurate 90° countersinks and chamfers with a superior surface finish, helping parts meet tight tolerances.
- 3-flute design for smooth cutting: Reduces vibration and improves chip evacuation, yielding accurate, repeatable results even on harder materials.
- Reliable versatility with 5.3 mm head: The 5.3 mm head diameter enables precise chamfer control on steels, aluminium, and plastics while a robust body stands up to daily workshop use.
Using this countersink helps you finish parts to spec faster, reduce rework, and maintain high surface quality across batches. It supports efficient workflows in machining, assembly, and maintenance by delivering dependable, repeatable results with every pass.
| Head Diameter | 5.3 |
| Small Diameter | 1.5 |
| Shank Diameter | 4 |
| Overall Length | 40 |
| Head Length | 4 |
| Angle | 90 |
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 DIN 3 Flute CountersinkS 90°
View full collection →You are viewing 335C-5.3-90. Click any other SKU to view its full details.
| Product SKU | Head Diameter | Small Diameter | Shank Diameter | Overall Length | Head Length | Angle | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|---|
| 335C-4.3-90 | 4.3 | 1.2 | 4 | 40 | 3.5 | 90 | £18.96 | 2-3 days | |
| 335C-5.3-90 Viewing | 5.3 | 1.5 | 4 | 40 | 4 | 90 | £19.75 | 2-3 days | |
| 335C-6.3-90 | 6.3 | 1.5 | 5 | 45 | 5 | 90 | £20.54 | 2-3 days | |
| 335C8.3-90 | 8.3 | 2 | 6 | 50 | 6 | 90 | £21.33 | 2-3 days | |
| 335C-10-0-90 | 10.0 | 2.5 | 6 | 50 | 7.1 | 90 | £22.12 | 2-3 days | |
| 335C-10.4-90 | 10.4 | 2.5 | 6 | 50 | 7.1 | 90 | £22.12 | 2-3 days | |
| 335C-11.5-90 | 11.5 | 2.8 | 8 | 56 | 7.5 | 90 | £23.70 | 2-3 days | |
| 335C-12.4-90 | 12.4 | 2.8 | 8 | 56 | 8 | 90 | £24.49 | 2-3 days | |
| 335C-15.0-90 | 15.0 | 3.2 | 10 | 60 | 9 | 90 | £32.39 | 2-3 days | |
| 335C-16.5-90 | 16.5 | 3.2 | 10 | 60 | 10 | 90 | £33.18 | 2-3 days | |
| 335C-19.0-90 | 19.0 | 3.5 | 10 | 63 | 11.2 | 90 | £41.87 | 2-3 days | |
| 335C-20.5-90 | 20.5 | 3.5 | 10 | 63 | 12.5 | 90 | £46.61 | 2-3 days | |
| 335C-23.0-90 | 23.0 | 3.8 | 10 | 67 | 13.2 | 90 | £60.04 | 2-3 days | |
| 335C-25.0-90 | 25.0 | 3.8 | 10 | 67 | 15 | 90 | £61.62 | 2-3 days | |
| 335C-26.0-90 | 26.0 | 3.8 | 10 | 67 | 15 | 90 | £67.94 | 2-3 days | |
| 335C-28.0-90 | 28.0 | 4 | 12 | 71 | 16 | 90 | £83.74 | 2-3 days | |
| 335C-30.0-90 | 30.0 | 4.2 | 12 | 71 | 18 | 90 | £86.11 | 2-3 days | |
| 335C-31.0-90 | 31.0 | 4.2 | 12 | 71 | 18 | 90 | £86.11 | 2-3 days |
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