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Robert Charles DIN 3 Flute Countersink 100° - 8.3mm Head Diameter
| Head Diameter | 8.3 |
| Small Diameter | 2 |
| Shank Diameter | 6 |
| Overall Length | 50 |
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Description
The Robert Charles DIN 3 Flute Countersink 100° - 8.3mm Head Diameter is a precision tooling solution designed to DIN standards for accurate 100° countersinking and chamfering. Its 3-flute geometry delivers smooth, stable cutting with efficient chip removal, producing a clean, consistent finish across steel, aluminium, and plastics. This countersink is suited for engineering, workshop, and production environments where precision and surface quality matter.
- Three-flute design for smooth, stable cutting: Delivers reduced chatter and efficient chip removal for a clean, consistent finish across materials.
- DIN 100° precision geometry: Maintains exact angles for reliable chamfers and flush fits, ensuring predictable results with every cut.
- Broad material compatibility and durable construction: Suitable for steel, aluminium, and plastics, built to withstand daily workshop use for repeatable performance.
This countersink helps streamline workflows by delivering repeatable, precise chamfers quickly, reducing the need for rework and enabling consistent surface quality in production, maintenance, or DIY projects. Trust it to deliver reliable results when accuracy and finish matter most.
Part Numbers
- Protool Part Number
- 335C-8.3-100
- 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: Robert Charles DIN 3 Flute Countersinks 100°
View full collection →You are viewing 335C-8.3-100. 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-6.3-100 | 6.3 | 1.5 | 5 | 45 | 5 | 100 | £30.02 | 2-3 days | |
| 335C-8.3-100 Viewing | 8.3 | 2 | 6 | 50 | 6 | 100 | £31.60 | 2-3 days | |
| 335C10-4-100 | 10.4 | 2.5 | 6 | 50 | 7.1 | 100 | £34.76 | 2-3 days | |
| 335C-12.4-100 | 12.4 | 2.8 | 8 | 56 | 8 | 100 | £37.92 | 2-3 days | |
| 335C-16.5-100 | 16.5 | 3.2 | 10 | 60 | 10 | 100 | £50.56 | 2-3 days | |
| 335C-20.5-100 | 20.5 | 3.5 | 10 | 63 | 12.5 | 100 | £69.52 | 2-3 days | |
| 335C-25.0-100 | 25.0 | 3.8 | 10 | 67 | 15 | 100 | £88.48 | 2-3 days | |
| 335C-30-100 | 30.0 | 4.2 | 12 | 71 | 18 | 100 | £154.84 | 2-3 days | |
| 335C-31.0-100 | 31.0 | 4.2 | 12 | 71 | 18 | 100 | £154.84 | 2-3 days |
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