... Material: Carbon steel, stainless steel,alloy steel,etc Product InformationHex cap screw with holes1. Size &type as your requirement2. Material: carbon steel ... copper,Etc.3. Surface treatment: zinc plate, black,chrome plate, Hot dip galvanizing, Geomet, Delta,Dacromet,Magni4. Parts can be supplied ... and steel certification and inspection report can be provided Hex cap screw with holes