screws and bolts 1.Materail: aluminum,carbon steel 2.over 10 years manufacturer 3.SGS,Rohs certification 4.free sample screws and bolts Material:stainless steel,steelStandard:ISO,DIN,BS,JIN,ASTM ANSI BA UNC UNFThread:metric and inch sizeHead style:variousSurface Finish:nickel plated,white zinc,black zinc,color zinc,blue zincPacking:poly bag,paper bag and carton ,kraft bag or according to the ...