Weld nuts are specialized fasteners designed to be permanently attached to metal surfaces through welding processes such as projection welding or capacitive discharge welding. Once welded, they provide load-bearing threads in assemblies where access is limited to one side or where traditional fastening methods are impractical. These fasteners are essential components across automotive, construction, aerospace, and manufacturing industries.
Available Types
| Type | Description | Typical Applications |
|---|---|---|
| Spot Weld Nut | Flat tab design for easy positioning; welded using spot welding equipment. Available with or without pilot for alignment | Thin sheet metal, light gauge applications, limited space assemblies |
| Projection Weld Nut | Features raised projections (typically 3 or more) that concentrate welding current and create strong, consistent welds . Available in hex, square, and tab configurations | Heavy gauge sheet metal, curved surfaces, high-stress applications |
| Square Weld Nut | Four uniform projections on a square base; provides strong and reliable welds with proper seating . Available in piloted or unpiloted configurations | Automotive manufacturing, farm equipment, industrial assemblies |
| Hex Weld Nut | Hexagonal shape with projections on the welding face; ideal for heavy-duty applications requiring higher torque resistance | Heavy equipment, structural connections, high-torque applications |
| Tab Weld Nut | Features a flat tab for stable mounting and easy electrode positioning; pilot ensures accurate alignment in pre-punched holes | Both flat and curved surfaces, automated assembly lines |
| Round Base Weld Nut | Circular base design that can be installed with automatic feeding equipment; suitable for applications with orientation limitations | Restricted space applications, automated production |
| Flange Weld Nut | Integrated flange provides larger bearing surface; available in stamped, through-the-hole, and on-the-material configurations | Strong joints, thin-gauge metal sheets |
| Retainer Weld Nut | Specialized design with retaining features for specific assembly requirements | Custom applications requiring additional retention |
Applicable Standards
| Standard | Description | |
|---|---|---|
| DIN 928 | Square weld nuts – metric series, M4 to M16 coarse thread, product grade A | |
| DIN 929 | Hexagon weld nuts – metric series, M3 to M16 coarse thread, product grade A | |
| JIS B 1196-2001 | General weld nut standard – Japanese Industrial Standard | |
| JIS B 1200:2018 | Hexagon weld nuts with flange – metric series, M5 to M16, product grade A | |
| JIS Weld Nut Series | Non-piloted square nuts with four uniform projections; commonly used in automotive applications |
Materials
| Material | Properties | Applications |
|---|---|---|
| Stainless Steel (300 Series) | Corrosion resistant, essentially nonmagnetic; | Automotive, marine, food equipment, medical |
| Low-Carbon Steel | Cost-effective, weldable; available with plain finish protected with light oil | General industrial, appliance manufacturing, structural applications |
Surface Finishes
-
Plain (with light oil protection) – carbon steel
-
Passivated – stainless steel
-
Plating options available upon request (applied after welding process)
Common Applications
-
Automotive: Body panels, chassis assemblies, farm equipment, heavy-duty applications
-
Sheet Metal Fabrication: Thin and heavy gauge sheet metal assemblies
-
Structural Steel Construction: Building frames, infrastructure projects
-
Aerospace Engineering: High-strength, vibration-resistant connections
-
Appliance Manufacturing: Home appliances requiring secure fastening points
-
Industrial Machinery: Equipment assemblies requiring robust threaded connections
No products in the cart.