Precision engineering meets practical versatility with the Dormer Pramet A402 M10 HSS Straight Shank Drill. Built to DIN 8376 standards and offered in standard length, this drill is purpose-built for creating accurate counterbores and clearance holes for standard metric threads, delivering reliable results in both CNC and conventional machines.

• 118-degree pilot and 180-degree counterbore: A purpose-designed combination that starts cleanly and finishes with a precise clearance diameter, making it ideal for M10 thread applications and clean bolt‑hole assemblies.
• Steam oxide finish: A tactile, low-friction coating that minimizes workpiece sticking to the cutting edge, helping maintain a smooth cut and reducing built-up edge for steadier feeds.
• Precisely matched pilot diameter and length: Engineered to produce the correct clearance drilling diameter and depth for standard threads, minimizing rework and ensuring consistent hole geometry across parts.
• Premium HSS material: High-speed steel offers durable performance across a wide range of materials—from steel and stainless steel to aluminum—delivering dependable drilling with long tool life.
• Versatile across machine types: Designed for both CNC and conventional equipment, providing reliable results whether you’re running a high‑volume production job or a quick, manual tap‑and‑drill operation.
• DIN 8376 compliant, straight shank: The straight shank ensures secure, stable holding in collets and chucks, with interchangeability and predictable performance in angled or rigid setups.

Use this drill when you need a precise clearance hole paired with a clean, flush counterbore for metric fasteners. In practice, it’s ideal for fabricating components where bolt heads or nut drives must sit flush with or below the surface, such as automotive brackets, equipment housings, or machine frames. The 10 mm diameter combined with the 180° counterbore helps you control depth and clearance in a single operation, reducing cycle times and improving hole accuracy across batches.

Compared with standard drilling options, the A402 design emphasizes a reliable starting pilot and a dedicated counterbore geometry, which translates to fewer pilot wander issues and more repeatable hole features. The steam oxide finish further protects the cutting edge during prolonged cuts, helping you maintain a consistent hole quality from the first hole to the last in a run.

Ideal for shops that require a dependable, all‑purpose solution for metric-thread clearance holes, this drill suits a wide variety of workflows—from prototype work to mass production. Its compatibility with both CNC programmers and manual operators makes it a versatile addition to any tool crib, especially where DIN 8376 tooling is the standard expectation.