MS Hex Weld Nut – Strong & Durable Welding Fastener MS Hex Weld Nuts are carbon steel (Mild Steel) fasteners designed for welding onto metal surfaces to provide a permanent, high-strength threaded connection. Their hexagonal shape allows for easy tightening with a wrench, while their flat base ensures a secure and stable weld onto sheets, plates, or structural components. Manufactured from premium mild steel, these weld nuts offer excellent strength, durability, and reliability in various industrial applications. They are widely used in automobile manufacturing, heavy machinery, construction equipment, metal fabrication, and industrial assemblies.