Set of 30 button-head rivet-style lock nuts

Set of 30 petal-style rivet nuts: Heavy-duty industrial carbon steel hardware, bolt-compatible, ideal for fastening and reinforcement in humid environments (sizes M4, M5, M6) Set contents: Three specifications (M4, M5, M6) totaling 30 petal-style rivet nuts to meet various application needs Material properties Carbon steel with galvanized (zinc-plated) finish: rust- and corrosion-resistant with industrial-grade durability; suitable for indoor, outdoor, and humid environments Application scenarios Industrial equipment assembly, automotive bodywork (sheet metal) repair, furniture hardware reinforcement, and thin panel fastening