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Dormer Pramet A402 M6 HSS ST STRAIGHT SHANK SUBLAND 180 DEG STANDARD LENGTH (X4D) DRILL DIN 8376
| Type | Long Series |
| Drill Diameter | 6.60 |
| Shank Diameter | 11 |
| Substrate | HSS |
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Description
Meet the Dormer Pramet A402 M6 HSS Straight Shank Subland Drill, a DIN 8376 standard-length solution built for precise clearance holes with an integral counterbore. Designed to create reliable counterbores for standard metric threads, this tool delivers accurate hole size and depth in a single, efficient operation.
- 118° pilot with 180° counterbore: Specifically engineered to generate the clearance drilling diameter and the corresponding counterbore depth for standard metric threads, reducing setup time and improving repeatability.
- Steam oxide finish: A smooth, anti-adhesion coating that minimizes workpiece material from sticking to the cutting edge, helping to extend tool life and maintain a clean cutting zone.
- Precisely defined pilot diameter and length: Ensures the correct clearance hole is produced every time, supporting accurate thread alignment and reliable fastener seating.
- Premium HSS material: Versatile enough for drilling a range of materials, including steel, aluminum, and stainless steel, making it a dependable choice for mixed-material workflows.
- Straight shank for CNC and conventional machines: The robust straight shank delivers stable performance, easy tool changes, and broad compatibility with milling centers and drill presses alike.
- Subland geometry in a standard-length drill: Designed to maintain consistent hole depth and finish, supporting clean, professional results in every assembly.
This drill is ideal for shops and production environments that need precise, repeatable counterbored clearance holes for M6 fasteners. Its combination of controlled pilot geometry, reliable counterbore depth, and durable HSS construction makes it a practical choice for both setup-heavy CNC workflows and hands-on conventional drilling tasks.

Part Numbers
- Protool Part Number
- DOR-A402M6
- Brand
- Dormer Pramet
- Category
- Drill
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: Dormer Pramet A402 HSS ST STRAIGHT SHANK SUBLAND 180 DEG STANDARD LENGTH (X4D) DRILLS DIN 8376
View full collection →You are viewing DOR-A402M6. Click any other SKU to view its full details.
| Product SKU | Drill Diameter | Shank Diameter | Price | Stock | Order |
|---|---|---|---|---|---|
| DOR-A402M3 | 3.40 | 6 | £31.56 | 2 days | |
| DOR-A402M4 | 4.50 | 8 | £36.53 | 2 days | |
| DOR-A402M5 | 5.50 | 10 | £43.68 | 2 days | |
| DOR-A402M6 Viewing | 6.60 | 11 | £50.62 | 2 days | |
| DOR-A402M8 | 9.00 | 114 | £70.22 | 2 days | |
| DOR-A402M10 | 11.00 | 18 | £132.70 | 2 days |
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