This 27mm 1/2" square drive deep impact socket is a purpose-made impact socket for use with 1/2" (12.7mm) square drive impact wrenches and breaker bars, designed to reach recessed nuts and bolts where a standard shallow socket will not. The socket accepts 27mm hexagon fasteners (27mm across flats) and provides the extra depth needed for long studded applications or where access is restricted.

Manufactured from chrome-molybdenum (Cr-Mo) alloy steel and heat-treated to increase toughness and impact resistance, the socket has a matt black phosphate / oxide finish to provide corrosion protection without brittle plating that can spall under impact use. The 6-point head profile grips the flats of hex fasteners to reduce rounding of corners when used with high-torque impact tools. The female drive is 1/2" square and includes a detent hole to accept a retaining pin or O-ring for secure attachment to impact tools and extensions.

The socket is produced to DIN/ISO dimensional standards for sockets and conforms to recognised British specifications for hand and impact tool dimensions where applicable, ensuring interchangeability with other 1/2" drive tools and accessories. As an impact-rated tool it should be used with impact-rated extensions and adaptors rather than chrome-plated hand sockets.

Typical applications include automotive and commercial vehicle maintenance, plant and machinery repair, agricultural equipment servicing, and general industrial maintenance where recessed or long-threaded fasteners are encountered. Garages, fleet workshops and heavy industry commonly use 27mm deep impact sockets for wheel nuts, suspension components and heavy equipment fastenings.

Key benefits include the superior toughness of Cr-Mo for repeated impact loading, a protective black finish that resists corrosion in workshop environments, and the 6-point geometry which offers positive engagement with hex fasteners. The 1/2" drive ensures compatibility with the wide range of professional impact wrenches and accessories.

Duchy Fasteners stocks a broad range of impact sockets and sizes; this 27mm deep impact socket is available individually and in trade packs, and our impact socket range typically covers common sizes from around 6mm up to 32mm to suit workshop and industrial needs.