1) Mechanical performance testing: including tensile strength, bending strength, etc., to ensure that the fittings can withstand the corresponding mechanical stress during use.
2) Electrical performance testing: including contact resistance, withstand voltage, etc., to ensure that the electrical performance of the fittings meets the requirements.
3) Corrosion resistance testing: Testing the corrosion resistance of fittings under different environmental conditions through methods such as salt spray testing.
4) Size and appearance inspection: Ensure that the size of the fittings meets the design requirements and there are no obvious defects in the appearance.