This is a 17 mm impact socket with a 1/2 inch square drive, designed for use with impact wrenches, air guns and heavy-duty cordless tools to loosen and tighten 17 mm hex nuts and bolts. Its primary use is for applications where high torque and repeated impact loading are required — workshops, vehicle maintenance and industrial plant servicing.

The socket is manufactured from chrome-molybdenum (Cr-Mo) alloy steel and is heat-treated to provide high torsional strength and toughness under impact loading. It features a 6-point hex recess to give positive engagement with fastener corners and reduce rounding, and a 1/2" (12.7 mm) square drive recess compatible with standard 1/2" impact breakers and extensions. The external finish is a protective black phosphate/oxide coating applied after machining to resist corrosion and to distinguish impact sockets from chrome-plated hand sockets. The design meets recognised DIN and ISO requirements for impact socket geometry and material performance and is produced to UK and European tool safety standards (BS/EN where applicable) for impact tools.

Typical applications include automotive repair and tyre shops, commercial vehicle and agricultural machinery maintenance, plant shutdowns and construction plant servicing where pneumatic or battery impact tools are used. The socket is suitable for use in confined spaces and with extension bars or universal joints on 1/2" drive systems. It is not intended as a substitute for chrome-vanadium hand sockets on manual ratchets; use only on impact-rated drives to avoid damage.

Key benefits include improved resistance to shattering and wear under repeated impact thanks to the Cr-Mo material and heat treatment, good corrosion protection from the black phosphate finish, and reliable compatibility with standard 1/2" drive impact tools. The 6-point configuration minimises fastener rounding and provides secure torque transfer.

Duchy Fasteners stocks this 17 mm 1/2" drive impact socket in bulk packaging (part code DR26885) and across a range of metric sizes. Available options include single pieces, multi-packs and complete 1/2" drive impact socket sets to suit workshop and fleet requirements.