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Weld nuts are internally threaded fasteners designed for permanent attachment to metal surfaces via projection or spot welding. Made from low carbon steel, stainless steel (SS304/SS316), or alloy steel, they provide strong, vibration-resistant threaded anchor points on thin-gauge or untappable sheet metal—eliminating the need for backside access or loose backing hardware. Widely used in automotive chassis, heavy machinery, structural steel fabrication, and appliance assembly.
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