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FULLERKREG DIN 928 square weld nuts are manufactured in stainless steel grade A2 (SUS304) with a pickled and passivated surface finish. Designed for resistance (projection) welding onto sheet metal panels, these nuts feature four precisely formed weld projections on the bearing face that concentrate heat during welding for consistent, high-strength weld joints. The square body provides excellent anti-rotation resistance in the parent material. Widely used in automotive body panels, electrical enclosures, HVAC equipment, and structural sheet metal fabrication.
| Standard | Type | Material | Grade | Surface Treatment | Thread | RoHS |
|---|---|---|---|---|---|---|
| DIN 928 | Square Weld Nut (Projection Welding) | Stainless Steel | A2 / SUS304 | Pickled & Passivated | Metric (M3–M12) | Compliant |
All dimensions in millimeters (mm). Weight per 1000 pcs in kg. Unit weight (g/pc) calculated from standard data. Refer to diagram: A = body width across flats, C = body thickness, D = thread diameter, H = projection height, E = projection diameter, F = projection pitch circle diameter.
| Thread (D) | Body Width (A) mm | Body Thickness (C) mm | Projection Height (H) mm | Projection Ø (E) mm | Proj. PCD (F) mm | Weight / 1000 pcs (kg) | Unit Weight (g/pc) |
|---|---|---|---|---|---|---|---|
| M3 | 9 | 3 | 0.8 | 1.5 | 5.5 | 1.40 | 1.40 |
| M4 | 11 | 3.5 | 0.9 | 1.8 | 7 | 2.60 | 2.60 |
| M5 | 13 | 4 | 1.0 | 2.0 | 8.5 | 4.20 | 4.20 |
| M6 | 16 | 4.5 | 1.1 | 2.3 | 10.5 | 7.30 | 7.30 |
| M8 | 20 | 5 | 1.2 | 2.8 | 13.5 | 14.50 | 14.50 |
| M10 | 25 | 6 | 1.4 | 3.2 | 17 | 28.00 | 28.00 |
| M12 | 30 | 7 | 1.6 | 3.8 | 20.5 | 50.00 | 50.00 |
Note: Dimensional data per DIN 928 standard. Weights based on SUS304 density (7.93 g/cm³). Actual weights may vary slightly by batch.
| Property | Value | Standard |
|---|---|---|
| Material Grade | A2 / SUS304 / 1.4301 | ISO 3506 |
| Tensile Strength (min) | 500 MPa | ISO 3506-2 |
| Proof Load Stress | A2-50 class | ISO 3506-2 |
| Hardness (max) | 220 HV | ISO 3506-2 |
| Chromium Content | 17.5–19.5% | ASTM A276 |
| Nickel Content | 8–10.5% | ASTM A276 |
| Magnetic | Non-magnetic (annealed) | – |
| Parameter | Guidance |
|---|---|
| Welding Method | Resistance projection welding (spot welding machine) |
| Parent Material | Stainless steel, mild steel, or galvanized sheet (0.8–3.0 mm) |
| Projection Function | 4 projections concentrate current for consistent weld nugget formation |
| Electrode Force | Adjust per sheet thickness; higher force for thicker panels |
| Post-weld Treatment | Passivation recommended to restore corrosion resistance at weld zone |
| Thread Protection | Use thread protector plug during welding to prevent spatter in thread |
| Application Scenario | Recommended Size | Reason |
|---|---|---|
| Electrical enclosures & control panels | M3 – M5 | Compact weld nut, clean interior thread, A2 non-magnetic |
| HVAC & ventilation ductwork | M5 – M8 | Corrosion-resistant, flush weld on thin sheet |
| Food processing equipment | M4 – M8 | SUS304 meets food-grade hygiene requirements |
| Automotive body & trim panels | M5 – M8 | High pull-out strength, anti-rotation square body |
| Structural sheet metal fabrication | M6 – M12 | Large body width distributes load across panel |
| Marine interior fittings | M5 – M10 | A2 stainless resists atmospheric and humidity corrosion |
DIN 928 specifies square weld nuts with metric threads and four weld projections, issued by the Deutsches Institut für Normung (DIN). The standard defines body dimensions, projection geometry, and thread tolerances for resistance welding applications. DIN 928 weld nuts are widely used across European and global manufacturing industries. FULLERKREG manufactures these nuts in A2 / SUS304 stainless steel with strict conformance to DIN 928 dimensional tolerances, pickled and passivated for maximum corrosion protection.
DIN 928 A2 Stainless Steel Square Weld Nuts – actual product photos
| [Photo 1] | [Photo 2] | [Photo 3] | [Photo 4] |
🏭 Direct Manufacturer – Factory-direct pricing with full dimensional traceability
📐 DIN Precision – Strict conformance to DIN 928 tolerances, projection geometry verified by QC
🔩 SUS304 A2 Grade – Excellent corrosion resistance for indoor and mild outdoor environments
⚡ Weld-Ready Projections – 4 precision projections ensure consistent resistance weld quality
✅ RoHS Compliant – All products meet EU RoHS environmental directives
📦 Bulk Wholesale Ready – MOQ flexible, available in bags, boxes, or bulk cartons
🌍 Global Shipping – Reliable export logistics to Europe, North America, Southeast Asia
💬 Technical Support – Engineering team available for welding parameters and substitution queries
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