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Robert Charles Single Flute Countersink 90° - M35-HSS-E 5% Cobalt - Metric - 21.0mm Head Dia
| Head Diameter | 21.0 |
| Shank Diameter | 10 |
| Overall Length | 65 |
| Shank Length | 37.5 |
| Inclusive Angle | 90 |
Learn more about Klarna
The Robert Charles Single Flute Countersink 90° – M35 HSS-E 5% Cobalt – Metric is designed for precise countersinking, chamfering, and deburring of metric holes while delivering excellent surface finish and durability. Manufactured from premium M35 HSS-E with 5% cobalt, this tool offers increased heat resistance, higher hardness, and extended tool life, making it suitable for machining tougher materials such as stainless steel, alloy steels, and non-ferrous metals. M35 cobalt steel is specifically developed to improve cutting performance and longevity compared with standard HSS tooling.
| Head Diameter | 21.0 |
| Shank Diameter | 10 |
| Overall Length | 65 |
| Shank Length | 37.5 |
| Inclusive 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 Single Flute Countersink 90° - M35-HSS-E 5% Cobalt - Metric
View full collection →You are viewing 5890-21.0-90. Click any other SKU to view its full details.
| Product SKU | Head Diameter | Shank Diameter | Overall Length | Shank Length | Inclusive Angle | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|
| 5890-4.0-90 | 4.0 | 4 | 44 | 36.0 | 90 | £26.07 | 2-3 days | |
| 5890-6.0-90 | 6.0 | 5 | 45 | 36.0 | 90 | £26.07 | 2-3 days | |
| 5890-8.0-90 | 8.0 | 6 | 45 | 32.0 | 90 | £26.86 | 2-3 days | |
| 5890-10.0-90 | 10. | 6 | 45 | 32.0 | 90 | £27.65 | 2-3 days | |
| 5890-12.5-90 | 12.5 | 8 | 48 | 32.0 | 90 | £32.39 | 2-3 days | |
| 5890-14.0-90 | 14.0 | 8 | 48 | 30.5 | 90 | £36.34 | 2-3 days | |
| 5890-16.0-90 | 16.0 | 10 | 56 | 36.0 | 90 | £41.08 | 2-3 days | |
| 5890-21.0-90 Viewing | 21.0 | 10 | 65 | 37.5 | 90 | £53.72 | 2-3 days | |
| 5890-25.0-90 | 25.0 | 10 | 65 | 36.0 | 90 | £72.68 | 2-3 days | |
| 5890-28.0-90 | 28 | 12 | 85 | 48 | 90 | £126.40 | 2-3 days | |
| 5890-35.0-90 | 35 | 15 | 102 | 56.5 | 90 | £213.30 | 2-3 days |
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