... Hex Nuts(ISO9001 Approve) Grade :4.8,5.8,6.8,8.8 Standard :DIN,GB,BSW Finish :plain,black,zinc SepecificationLong Hex ... and nut, for example :hex bolt DIN933,hex bolt DIN931,hex nut DIN934,GB5783 bolt,Flange bolt, BSW 916Hex Nuts,Flange nut,round nut ...