The adjustment device, particularly for thermal release an electrical switching device, measures to support strip (6) attached blood bimetal (5) is equipped with an adjusting threaded element (13) with a head (12), which is its bottom portion in pressing engagement with belt holder ( 6) or formed thereon auxiliary arm, the threaded shank (14) serizovacíhozávitového element (13) is a thread guide at least in the lower shell (1) of the casing of the electric apparatus through the bottom of the lower shell (1), the electric apparatus housing extending two opposite walls (15 ) or projections and forming the threaded shank (14) seals the groove (16) into which the threaded shank (14) imprinted to the occurrence of image to its threaded line optionally is tight groove (16) has a nut (17) arranged therein across and axially rigidly.
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