Material: Carbon steel
Property classes: 4, 8, 10, 12
Surface finishes: Plain, blue-white zinc plated, yellow zinc plated, hot-dip galvanized, black oxide, Dacromet
High-strength black oxide square nuts are made of high-quality carbon steel with professional black oxide anti-rust treatment, offering excellent oxidation and corrosion resistance, effectively slowing wear and extending service life. High-strength material provides high hardness and strong load capacity, resisting thread stripping and fracture. Square shape fits tooling securely for precise positioning. Suitable for high-strength fastening applications such as heavy machinery, industrial frames, and assembly line systems. High cost-performance, meeting various standard and heavy-duty connection needs.