SQUARE NUTS- DIN 557

🔩 Classic Four-Sided Nuts for Strong, Reliable Fastening

DIN 557 Square Nuts are traditional four-sided nuts designed for secure and robust fastening in structural and general-purpose applications. With a greater surface contact area than hex nuts, square nuts offer better resistance to loosening due to vibration and are ideal for use with flat wrenches and pliers—especially in older equipment, woodworking, and metal framing.

At National Fasteners, we manufacture DIN 557 square nuts with precision threading and high-strength materials. These nuts are widely used in both modern and traditional fastening systems across various industries.

🔧 Product Specifications:

• Standard: DIN 557

• Size Range: M5 to M16 (3/8″ TO 1″ INCH)

• Thread Type: Metric Coarse (Fine thread on request)

• Thread Tolerance: 6H

• Material Options:

  • Low Carbon Steel

  • Alloy Steel

Available Finishes:

• Self-Color (Plain)

• Zinc Plated (Clear / Yellow)

• Black Oxide

• Hot-Dip Galvanized

• Phosphate Coated

⚙️ Key Features of DIN 557 Square Nuts:

• Four-sided design offers a greater bearing surface

• Resists loosening under vibration and dynamic load

• Easy to grip with spanners, wrenches, and pliers

• Ideal for use in channel or wood framing systems

• Compatible with square head bolts and threaded rods

• Available in various coatings for corrosion resistance

🔩 Common Applications:

• Machinery and mechanical structures

• Woodworking and timber construction

• Architectural steel and framing systems

• Agricultural equipment and tools

• Electrical panels and metal enclosures

• Restoration of vintage machinery or furniture

💡 Why Choose National Fasteners for DIN 557 Square Nuts?

✅ ISO 9001:2015 Certified Manufacturing
🧪 In-House Testing for Threads, Coating, and Dimensions
⚙️ Custom Sizes, Threads, and Surface Treatments Available
🏭 Bulk Supply with Fast Turnaround and Global Shipping
🌍 Trusted by Industrial Buyers Across Multiple Sectors

📞 Request a Quote or Sample

Looking for dependable DIN 557 square nuts in bulk?
Reach out today for competitive pricing, custom solutions, or product samples.

👉 Request a Quote | 📧 sales@nationalfasteners.in | 📞 +91 70093-08799