... sample 4.Rohs or SGS aluminum/ steel flat and round head solid rivet factoryA: SpecificationSize: <20mmmaterial: brass,aluminum. ... Anodize,Plain,Chrome plated,Hot Deep Galvanize(H. D. G. ) etc.Heat TreatmentTempering,Hardening,Spheroidizing,Stress Relieving.StandardISO, ... in this field) and strict QC and QA system Have passed the quality authenticationHigh efficiency hardware conversionQucick delivery ...