... Standard :DIN,GB,BSW Finish :plain,black,zinc SepecificationLong Hex nut (ISO9001 Approve) Materail :carbon steelSize of bolt :M3~M64Thread :half ... are produce kinds of bolt and nut, for example :hex bolt DIN933,hex bolt DIN931,hex nut DIN934,GB5783 bolt,Flange bolt, BSW ... 916Hex Nuts,Flange nut,round nut,lock nut etc.Our products are of high quality and reasonable in ...