1size:M6-M16 2material:carbon steel,ss304.ss316.etc 3model number:screw 4standard:DIN,ANSI,JIS,GB,ISO screw with gule 1place of origin:guangdong China(mainland)2model number:screw3material:carbon steel,stainless steel,ss304,ss316,or according to client's requirement4standard:DIN,ANSI,GB,JIS,ISO5surface treatment:Zinc plated,Nickel plated,plain,nigrescence6certificate:ISO2008 locking screw