When the bolts are tightened to the frame of the module, the toothed spacer on the bottom edge penetrates the anodized layer of the aluminum frame , use a standard wrench to tighten the nut Compact and sturdy, in the shape of an outer hexagon, it is tin-plated copper It is, wear-resistant and rust-proof, and can be used for a long for time The grounding terminal is a for for protection grounding component, which collects the static electricity on the photovoltaic module and the photovoltaic and leads it to the ground through the grounding copper wire It is suitable for for protection and grounding applications of solar photovoltaic systems such as photovoltaic roofs, photovoltaic grounds, photovoltaic carports, and photovoltaic vegetable greenhouses, Manufacturer: Tsophreniq