This is a 30 mm impact socket with a 1/2 inch (12.7 mm) square drive, designed for use with pneumatic or battery-powered impact wrenches and heavy-duty ratchet drivers. Its primary use is the rapid application and removal of hex-headed fasteners under high torque conditions, for example wheel nuts, suspension bolts and large plant fixings where impact tools are required to deliver repeatable torque quickly and safely.

The socket is manufactured from chrome-molybdenum (Cr-Mo) alloy steel, heat-treated for improved toughness and shock resistance compared with standard chrome-vanadium hand sockets. The inside drive recess accepts a 1/2" square drive and is supplied with a retaining pin hole and O‑ring groove to ensure secure attachment to impact tools. The working end is a 6-point (hex) profile sized for 30 mm fasteners to give maximum contact with the flats of the nut or bolt and reduce the risk of rounding under heavy loads. The external finish is a matt black phosphate/oxide which provides corrosion resistance and helps distinguish impact sockets from polished chrome hand sockets in a workshop environment.

The socket is manufactured to meet relevant DIN, ISO and BS tool standards for impact sockets and square drives, and is suitable for use where conformity to industry tooling standards is expected. As an impact-rated tool it is intended for intermittent high-torque use; it should not be used with hand torque wrenches calibrated for precision torque readings.

Typical applications include automotive workshops (wheel nut removal and fitting), commercial vehicle maintenance, agricultural machinery service, construction plant maintenance and general industrial assembly and breakdown work. The Cr‑Mo construction offers superior tensile strength and fatigue resistance to withstand repetitive impact loading, while the 6‑point profile improves grip on heavily corroded or high-torque fasteners. The 1/2" drive makes the socket compatible with the most common mid-size impact guns and breaker bars used in trade and industry.

Duchy Fasteners stocks this 30 mm 1/2" drive impact socket individually and in bulk packaging; we also carry a wide range of metric impact socket sizes (common sizes through to 32 mm) available as single pieces, multi-packs or as part of sets to suit workshops and trade users.