Cross slot pan head self tapping screw (cross)

　　Strength: Surface hardness 450-600HV 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: Blue white zinc

　　Surface treatment content and function: rust prevention, decoration, and improving corrosion resistance

　　Applicable materials: Coating of various types of steel parts

　　Appearance: Blue and white. Execution standard: ASTM-B633-98, not environmentally friendly