... plated,Tin plated,Black phosphating ,anodized ,Parkerising,and Environmental Plated is used in our products,Hexavalent ... experiences in screw,bolt,nut,washer,rivet, stud, pin,wrench and so on .2. Our company had ... slide when fasteners match with machine,furniture ,drywall ,wood and so on.4. We have strict quality ... are used in most of places such as drywall,concrete,chipboard,machine,wood...2) Main export ...