Disc nut circular wing

　　Strength: 4 Material: carbon steel, alloy steel

　　Material: Low carbon steel

　　Material description: C ≤ 0.12, Si≤0.30,Mn≤0.50,P≤0.035，P≤0.035，S≤0.040，Cu≤0.30，Cr≤0.30，Ni≤0.30，N≤0.008

　　Surface treatment: trivalent blue white zinc

　　Surface treatment content: Function: Rust prevention, decoration, and improved corrosion resistance Applicable materials: Various types of steel parts Coating appearance: blue white Executive standard: ASTM-B633-98 Environmental protection, neutral salt spray test 96h No red rust