Industrial-Grade M3-M16 Square Nuts: High-Torque Fastening Solutions
Our M3-M16 Square Nuts are engineered for applications that require a larger bearing surface and higher resistance to loosening than traditional hex nuts. Specifically designed to fit into square slots or provide a robust grip in blind-hole assemblies, these four-sided nuts are foundational in electrical, automotive, and agricultural machinery. As a professional square nut factory, we ensure every piece meets the precise tolerances of DIN 557 and DIN 562 standards.
Available in a full range of sizes from M3 to M16, our square nuts are crafted from high-grade materials including 304/316 Stainless Steel for corrosion resistance and Zinc-Plated Carbon Steel for structural strength.
- Greater Surface Contact: The square shape provides more surface area against the part being fastened, reducing the risk of the nut pulling through or loosening under vibration.
- Anti-Rotation Design: Ideal for use in tight channels or slots where the nut cannot be held with a wrench during assembly.
- Standard Compliance: We offer both DIN 557 (Regular/Thick) for heavy-duty use and DIN 562 (Thin/Flat) for space-constrained electronics.
- Custom Finishes: From Hot Dip Galvanized (HDG) for outdoor solar mounting to Black Oxide for a professional aesthetic finish.
Choose the correct metric square nut based on your torque requirements and space limitations.
| Thread Size | Width Across Flats (s) | Thickness (m) – DIN 557 | Thickness (m) – DIN 562 |
|---|---|---|---|
| M4 | 7.0 mm | 3.2 mm | 2.2 mm |
| M6 | 10.0 mm | 5.0 mm | 3.0 mm |
| M8 | 13.0 mm | 6.5 mm | 4.0 mm |
| M10 | 17.0 mm (or 16mm) | 8.0 mm | 5.0 mm |
| M12 | 19.0 mm (or 18mm) | 10.0 mm | 6.0 mm |
Our M4-M16 Square Nuts are versatile fasteners used in:
- Electrical Infrastructure: Securing components in switchgear and control panels.
- Automotive & Railway: Ideal for chassis and track assemblies where vibration resistance is critical.
- Slot Channel Systems: Sliding into aluminum extrusions or strut channels for custom framing.
- Agriculture: Heavy-duty mounting in plows, tractors, and irrigation systems.
Q: Why use a square nut instead of a hex nut?
A: Square nuts offer a larger contact surface and are much easier to hold in place within a slot, preventing the nut from spinning when the bolt is tightened.
Q: Do you provide M10 Square Nuts in Hot Dip Galvanized?
A: Yes, we specialize in HDG Square Nuts for outdoor structural and solar mounting applications to ensure 20+ years of rust protection.
Source M3-M16 Square Nuts from a Professional Supplier
Looking for bulk square nuts with precise tolerances and competitive pricing? We support OEM customization and global shipping. Contact us today for a free quote and technical samples!
