cap screw 1.Materail:stainless steel,steel 2.certification: ISO,SGS 3.Good after-sale service 4.free sample Socke head cap screw with washerMaterial: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 ...