Fastening component free from electrochemical corrosion and stage light fixture with same

A fastening component free from electrochemical corrosion, comprising

• a first fastening plate;
• a second fastening plate;
• and
• a fastening screw connecting the first fastening plate with the second fastening plate, the first fastening plate and the second fastening plate being respectively provided with a first fastening hole and a second fastening hole corresponding to the fastening screw, a screw shaft of the fastening screw being penetrated through the first fastening hole and entered the second fastening hole, and a head of the fastening screw being abutted against the first fastening plate,
• wherein the head is sleeved with an isolation member for preventing the first fastening plate and the fastening screw from electrochemical corrosion, the isolation member comprises
• an annular spacer between a lower end face of the head and the first fastening plate,
• a first segment surrounding a side wall of the head and connected to the annular spacer;
• and
• a second segment sleeving outside of the screw shaft inside the first fastening plate and connected to the annular spacer inside the first fastening plate,
• wherein an upper end face of the first segment is higher than or flush with an upper surface of the first fastening plate or an upper end face of the head in a smaller height.