🔩 Square Weld Nut – 4-Projection / Spot Welding Type | Neo Fasteners
Square Weld Nuts are internally threaded nuts with a square base and four precision-formed weld projections, designed specifically for resistance spot welding onto metal surfaces. These projections ensure quick and consistent welding, making square weld nuts ideal for high-volume production, robotic welding, and automotive chassis assemblies.
Unlike standard nuts, square weld nuts become a permanent part of the assembly, creating strong threads in sheet metal and structural components.
✅ Key Features
- Four raised welding projections for excellent current flow and weld strength
- Square shape provides anti-rotation stability
- Designed for quick weld-through-automation or manual resistance welding
- Threaded nut becomes integral part of structure after welding
- Available in multiple materials and thread sizes
- Ideal for thin metal sheets, enclosures, frames, and body panels
🧱 Material Options
- Mild Steel (MS) – Common choice for automotive and general fabrication
- Low Carbon Steel – Easier to weld, ideal for automation
- Stainless Steel (SS 304 / SS 316) – Corrosion-resistant for marine, food-grade, and outdoor applications
- High Tensile Steel (Grade 8 or 10) – For structural load applications
- Brass (on request) – For electrical or aesthetic use
🎨 Finishes Available
| Finish | Description |
|---|---|
| Self-Color / Plain | Preferred for clean welding contact |
| Phosphated | Prevents surface rust before welding |
| Zinc Plated (Post-Weld) | For corrosion resistance after welding |
| Geomet / Dacromet | Environment-friendly, salt spray resistant (on order) |
🔧 Most weld nuts are supplied in plain finish to avoid weld interference.
📏 Available Sizes – Metric & Inch (UNC/UNF)
| Metric Size | Thread Pitch | Inch Size | Common Use |
|---|---|---|---|
| M4 to M16 | Coarse & Fine | 1/8" to 5/8" | Automotive, fabrication |
Custom threading and size options available upon request.
📐 Technical Standards
- DIN 928 – Square weld nut with 4 projections
- ISO 21670 – International equivalent for spot weld nuts
- IFI / ASME B18.2.2 (Inch Threads) – UNC/UNF weld nuts
- Threads to ISO Metric, Unified National, or custom
- Complies with ISO 9001:2015 and RoHS standards
🧰 Applications
- Automotive: Body panels, chassis frames, suspension supports
- Fabrication: Sheet metal enclosures, doors, and brackets
- Electrical: Cabinets, distribution boxes, control panels
- Construction: Solar frame welds, railings, scaffolding
- Industrial: Conveyor structures, HVAC mounts, shelving
- Defence and Railways: Armoured vehicles, locomotives
📦 Packing & Supply
- Standard: 100 / 200 / 500 pcs in polybags or cartons
- Bulk: 25 kg or 50 kg HDPE-lined corrugated boxes
- Export: Palletized, shrink-wrapped containers with MTC
- Material Test Certificates & Compliance Certificates available on request
🔧 Related Products at Neo Fasteners
- Hex Weld Nut (DIN 929)
- Flanged Weld Nut (Pilot Type)
- Round Base Projection Weld Nut
- Slotted Tab Weld Nuts (on request)
📞 Contact Neo Fasteners
📧 Email: neofasteners@yahoo.com
📞 Call/WhatsApp: +91-96328 07665
🌐 Websites:
📍 Location: Bengaluru, Karnataka, India