Square Nuts
Square Nuts are four-sided fasteners that provide a larger surface contact area compared to hex nuts, resulting in greater resistance to loosening and stripping. Their shape makes them easy to grip with a wrench, and they are often used with flat washers in assemblies.
| Parameter | Specification |
|---|---|
Product Type |
Square Nut |
Size Range |
M4 – M48 (custom sizes available) |
Material Options |
Stainless Steel, Carbon Steel, Mild Steel, Brass |
Standards |
DIN 557, DIN 562, ISO, BS, ASTM |
Surface Finish |
Zinc Plated, Hot-dip Galvanized, Nickel Plated, Black Oxide |
Industrial Applications
Square Nuts are widely used in:
- Electrical panels and assemblies: Provide safe and stable fastening with minimal risk of nut slippage.
- Automotive industry: Used in body assemblies and vehicle parts where larger bearing surface is advantageous.
- Construction and steel structures: Common in channel frameworks, brackets, and architectural metalwork.
- Furniture making: Offer vintage and traditional aesthetics in wooden and metal furniture joints.
- Machinery and equipment: Applied in assemblies requiring greater torque and load distribution.
Product Description
Square Nuts are characterized by their four-sided design, which offers better surface grip and greater load distribution compared to hex nuts. This design reduces the chances of rounding off under torque and makes them ideal for use in assemblies that require higher clamping forces. Square nuts are often paired with square head bolts or machine screws but can also be used with standard bolts. Available in standard and thin (jam) types, they are a preferred choice in both industrial and decorative applications where strength and aesthetics are important.
Product specifications
- Nut Type: Four-sided (square) nut, available in standard and thin profiles
- Size Range: Metric M4 – M48; inch sizes also available
- Thread Type: ISO metric coarse/fine, UNC/UNF, custom threading available
- Material Options: Stainless steel (A2/A4), mild steel, carbon steel, brass, alloy steel
- Surface Finish: Zinc plating, hot-dip galvanizing, nickel plating, black oxide, chrome plated, plain finish
- Strength Class: Property classes 4, 6, 8, 10; ASTM Grades available for structural applications
- Tensile Strength: Up to 1,000 MPa depending on grade and material
- Hardness: Rockwell C19–C38 for alloy materials
- Load Distribution: Greater surface area contact reduces wear and increases stability
- Operating Temperature: -50°C to +400°C depending on material and coating
- Corrosion Resistance: Higher when made of stainless steel or with protective finishes
- Applications: Machine assemblies, construction, electrical, furniture, and heavy equipment
- Standards/Compliance: DIN 557, DIN 562, ISO, BS, ASTM A563
- RoHS/REACH Compliance: Available for stainless steel and coated versions
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