A comprehensive investigation was immediately initiated on receipt of the complaint.The product was not returned to manufacturer for evaluation, and a thorough investigation could not be completed as the lot number has not been identified/confirmed in this case.Since the screw was not returned, no physical, chemical evaluation could be performed, and the root cause of the reported issue could not be ascertained.Reasonable attempts were made to obtain further information, but no additional information was provided, and a root cause could not be determined.
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