Punching Rivet with abroad use 1)Surface finish: per requirement. 2)ISO9001, ISO14001, ISO13485. Name:Punching RivetMaterial:Iron.1) High precision metal machining parts.2) Min Tolerance: +/- 0.01mm3) Surface treatment: Black; Zinc, Nickel, powder coating, sand blasting etc4) Certification: ISO16949, ISO9001, ISO14001, ISO13485 Main products:Precision metal parts like various nuts,screws,axes, ...