Rice shaped countersunk fiberboard nails with full teeth

　　　Strength: surface hardening 400HV Material: carbon steel, alloy steel
　　Material: 1022
　　Material Description: Aluminum deoxidized steel Composition: C: 0.18-0.23; Si：≤0.10; Mn：0.70-1.00；P：≤0.030；S：≤0.035；AL：≥0.02
　　Surface treatment: colored zinc
　　Surface treatment content: Galvanized, requires passivation for better corrosion resistance. Passivation with colored passivation solution can obtain colored zinc.
　　Risk reminder: The hardness value of hardened steel on the surface of fasteners is ≥ 320HV, and there is a risk of hydrogen embrittlement during electroplating!