This 316 stainless steel PV bolt offers industry-leading corrosion resistance for harsh outdoor environments. The addition of molybdenum to 316 stainless steel provides enhanced protection against chloride-induced corrosion, making it suitable for long-term use in coastal areas with high salt exposure. The A4-70 strength grade delivers a tensile strength of 700 MPa, ensuring reliable load-bearing capacity for large-scale commercial and utility-scale solar projects. The electropolished surface is smooth and non-porous, preventing the buildup of dirt and corrosion-causing particles, and simplifying maintenance over the 25+ year lifespan of solar systems. The torx drive design provides better grip than standard hex drives, allowing installers to apply higher torque without damaging the bolt head, reducing installation errors and improving overall assembly quality. The coarse metric thread ensures quick and easy threading into pre-drilled holes, even in dense stainless steel or concrete foundations.
This 316 marine grade PV bolt has precise specifications tailored for high-demand solar applications. The diameter range covers M6 to M14, with available lengths from 30mm to 200mm to fit large-scale racking systems and deep foundation installations. The pan head design has a low profile that sits flush with mounting surfaces, reducing the risk of damage during transportation and on-site handling. The thread follows the ISO metric coarse thread standard, with pitches ranging from 1mm for M6 bolts up to 2mm for M14 bolts, ensuring secure engagement with matching nuts. The hardness ranges from HV 220 to 270, balancing strength and toughness to withstand high torque during installation and long-term load stresses. Each batch of bolts is inspected for dimensional accuracy, thread quality, and corrosion resistance, with batches tested to meet the 2000-hour salt spray standard. The bolts are packaged in sealed metal-free crates to prevent galvanic corrosion during transportation and storage.
This A4-70 316 stainless steel PV bolt is specifically designed for utility-scale solar farms, coastal residential installations, and industrial outdoor solar projects in high-corrosion environments. It can be used for ground-mounted rack systems on coastal piers, rooftop installations in humid coastal regions, and solar projects near saltwater bodies. The bolt is suitable for solar arrays with capacities ranging from 100kW up to multi-megawatt scale projects, securing large racking components to concrete piers, steel piles, and heavy-duty foundations. It is compatible with most high-end stainless steel and aluminum alloy PV mounting hardware, providing a long-lasting fastening solution that requires minimal maintenance over the lifespan of the solar system. Unlike standard 304 stainless steel bolts, this 316 grade bolt can withstand prolonged exposure to salt air and chloride environments without corroding, making it the preferred choice for coastal solar installations.
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