This is an 85 mm cranked immersion spanner designed to reach and turn recessed or obstructed hexagonal nuts and fittings where a standard flat spanner cannot get purchase. Its primary use is to remove and install immersion heater elements, gland nuts and other deeply set fasteners in boilers, tanks and plant housings where clearance between the nut and surrounding structure is restricted.

The spanner is manufactured from chrome vanadium steel (Cr-V) and is drop-forged and heat-treated to provide the torsional strength and wear resistance required in workshop and on-site service. The tool is finished with a polished chrome plate to resist corrosion and ease cleaning; the working faces are machined to accurate dimensional tolerances and the size (85 mm across flats) is laser-etched for permanent identification. The head is an open-ended, cranked style providing an offset that increases clearance for fingers and fittings; the crank angle gives better access to recessed hexes without the need for extension pieces. As a hand tool, there is no drive or thread form associated with the spanner itself, but it is produced to match common metric spanner dimensional standards (conforming to established DIN, ISO and BS metric spanner profiles where applicable) for compatibility with standard hex fasteners.

Typical applications for the cranked immersion spanner include plumbing and heating work (immersion heaters, boiler element nuts), industrial maintenance on tanks and pressure vessels, marine enginerooms where space is confined, and HVAC installations where recessed gland nuts are used. It is a staple tool for installers, service engineers and maintenance technicians who regularly work with recessed or hard-to-reach hex fastenings.

Key benefits of this 85 mm cranked immersion spanner are its corrosion-resistant chrome finish for prolonged life in humid environments, the strength afforded by heat-treated Cr-V construction to resist rounding and fatigue, and dimensional compatibility with metric hex fasteners so replacement or ancillary parts fit without modification. The cranked profile reduces the risk of knuckle damage and allows greater torque to be applied in cramped spaces compared with thin-profile open-ended wrenches.

Duchy Fasteners stocks the Draper Tools Group D item DR13693 and maintains a range of cranked and immersion spanners in multiple metric sizes; the 85 mm model is available as a single tool and is supplied alongside other sizes in trade packs for workshop stocking. Contact us for current availability and pack options.