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CONNECT VOLUME I STANDARDIZATION 3 INTRODUCTION Every five years standards are checked for their compliance with stateoftheart technical requirements Also from a legal point of view this is an important measure Lack of knowledge of or noncompliance with valid standards and crossreference included often result in complaints or even damage claims In past years numerous DIN standards were replaced by internationally applicable DIN EN ISO standards Knowing which standards are still in effect and which ones were replaced is an imperative for exportoriented companies In case of repair the customer or mechanic must be able to procure fasteners that comply technical requirements In warranty cases the manufacturer must prove compliance with all rules applicable at start of operation In practice numerous users continue to use products complying with withdrawn standards that have been replaced by successor standards or even products complying with no longer valid standards that have not been replaced For the distribution of fasteners this means increased efforts in storage and disposition of items In addition some fasteners are produced by only a small number of manufacturers and in low volumes according to applicable standards due to low demand This situation can have a negative impact on procurement prices Products compliant with withdrawn standards should only be used to meet the demand for spare parts In some cases in which standards have been withdrawn and not replaced e g because proper function was not guaranteed or standards were revised due to safety reasons it is absolutely necessary to comply with the state of the art This brochure shall be a tool for changing from withdrawn DIN standards to valid EN and or ISO standards In includes information on changes in the product standards relevant for usage