Hexagon Stud Connectors, also called Coupling Nut, are made based on withdrawn DIN 6334 standard.
As DIN 6334 is no longer available (there is no possibility to obtain the last know official version of the standard) and there is no known alternative, the dimensions shown are for reference only. A customer at the time of purchase shall specify with the manufacturer/supplier specific tolerances.
As an alternative, please have a look into Bolt Extenders – General specification (coarse thread) which can be made from blanks in selected grade.
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Whilst the information is provided in good faith, Andrews Fasteners Ltd are not under any responsibility or liability in respect of errors or information that was found to be incorrect or for any reliance the user may place on it.