DIN933 1.Standard :DIN,ANSI/ASME,BS,AS 2.Size:M3-M76 3.Surface:Plain,Zinc plated,Black,Hot galvanized 1.Standard:DIN931/933,DIN558/601,DIN6914,DIN960/9612.Metail:Carbon steel,stainless3.Size:M3-M764.Standards:DIN ,ANSI/ASME,BS,GB,JIS,Non-standard5.Surface:plain,zinc plated,black oxide,hot dip galv.etc.