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 weld nuts feature professional black oxide anti-rust treatment, offering excellent oxidation and corrosion resistance, effectively extending service life after welding. High material hardness and strong load capacity. Resists cracking and thread stripping after welding. Square shape fits the welding surface for precise positioning and convenient welding. Suitable for heavy machinery, industrial frames, assembly line welded components, heavy-duty equipment, and other applications. High cost-performance, meeting high-strength welding fastening requirements.