Assembly tools for screws and nuts. Drive ends for hand and machine-operated screwdriver bits and connecting parts. Dimensions, torque testing algolia-ignore What is BS EN 61822

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Assembly tools for screws and nuts. Drive ends for hand and machine-operated screwdriver bits and connecting parts. Dimensions, torque testing algolia-ignore What is BS EN 618221 Scope This International Standard specifies the dimensions and torque testing of drive ends for hand and machine operated screwdriver bits as well as to driving spindles of screw driving machines. It ensures the interchangeability of tool bits and tool holders. This International Standard defines only the distinctive features of individual drive ends. Details of design, e. g. of fixing devices, are left to the user of this International Standard.