When precision matters in metal fabrication, the Dormer Pramet A402 M5 HSS ST Straight Shank Subland 180 Degree Standard Length drill (DIN 8376) delivers clean, repeatable counterboring for metric threads. The 118° pilot paired with a 180° counterbore creates an exact clearance hole and a flush seating surface for M5 bolts, enabling robust joints in a single, efficient operation.

• 118-degree pilot: ensures an accurate clearance diameter for standard metric threads and minimizes walking in tough materials.
• 180-degree counterbore: provides a true seating depth and a flat surface for bolt heads, ensuring a secure, flush finish.
• Steam oxide finish: reduces galling and prevents the workpiece material from sticking to the cutting edge, improving tool life and smooth chip flow.
• Precisely matched pilot diameter and length: designed to produce the correct clearance drilling diameter and depth for reliable thread engagement.
• Premium HSS material: versatile enough to drill a wide range of materials, including steel, aluminum, and stainless steel, with consistent performance.
• DIN 8376 standard length with straight shank: ensures dependable compatibility with common CNC and conventional machine setups, collets, and toolholds.
• Subland geometry: engineered to form the clearance hole beneath the countersink so fasteners seat cleanly and assemblies stay strong.

Ideal for assemblies that rely on standard metric threads, this drill excels in fabrication of frames, brackets, housings, and enclosures where a precise clearance hole plus a flush bolt-head seating is required. It’s a dependable choice for workshops that run both CNC and traditional machines, offering consistent results across materials from steel to stainless steel.

How it helps your workflow

• Consolidates two operations into one pass: clearance drilling and counterboring for M5 fasteners, reducing cycle time.
• Improves fit and finish in assemblies by delivering a clean, square hole with an exact depth for bolt heads.
• Extends tool life with a steam oxide finish that minimizes sticking and galling during cutting and chip evacuation.