... 1.ISO system certification. 2.Material:Stainless steel,Carbon steel. 3.OEM/ODM orders are ... tensile force tester,etc 3 ) Materials:Different kinds of stainless steel, (303,304, 316 Etc) Brass ( C3602, C3604 ... , lead-free, Etc) , aluminum( 6061,6063 Etc.) , steel, etc. 4) Finish: Anodized, Polishing, zinc plated , nickel plated ... gas heater, furniture etc. bolts screws stainless steel fasteners