Square Nuts

South Coast Fasteners, Inc. supplies square nuts built for secure fastening and broad surface contact. With four-sided profiles, square nuts provide greater resistance to loosening compared to hex nuts and are easier to grip with tools. They are commonly used in construction, furniture, equipment assembly, and restoration projects where both strength and traditional design are valued.

Get Superior-Quality Fasteners at Competitive Prices

Use the options below to find the fasteners you need in the quantities required for your application. Questions? Contact us today, and our team will gladly assist you in finding the best fastening solutions for your requirements. With South Coast Fasteners, you can count on helpful support, competitive pricing, and top-quality products for all your fastener requirements.

Types of Square Nuts We Offer

Grade 2 Square Nut, Plain

These plain Grade 2 square nuts are economical fasteners for general-purpose use. Their four-sided design provides greater surface contact against workpieces, reducing the chance of loosening. They are commonly found in furniture assembly, equipment repair, and light construction in indoor environments.

Grade 2 Square Nut, Zinc CR+3

These nuts combine Grade 2 strength with a zinc clear coating for corrosion resistance. They are widely used in machinery, light structural work, and assemblies exposed to moderate environmental conditions. The square profile makes them easier to grip and tighten in applications requiring secure fastening.

Grade 2 Square Nut, HDG

Hot-dip galvanized Grade 2 square nuts are designed for outdoor use and harsh environments. The thick zinc coating protects against corrosion, making them suitable for fencing, utility structures, and outdoor equipment. Their square shape ensures strong bearing contact and secure fastening under load.

Square Machine Screw Nut, Zinc CR+3

These machine screw nuts are designed for smaller threaded assemblies where compact fastening is required. The zinc clear coating provides corrosion protection, making them suitable for electronics, light equipment, and consumer products. Their square shape allows for easy tightening and alignment in precise assemblies.

Stainless 18-8 Square Nut

Made from stainless 18-8 steel, these square nuts provide excellent corrosion resistance and durability. They are commonly used in marine, chemical, and outdoor applications where exposure to moisture is constant. Their square profile provides secure fastening and a traditional appearance in both industrial and decorative projects.

Material Options

South Coast Fasteners stocks square nuts in material grades chosen for strength, durability, and environmental performance.

Low Carbon Steel - Grade 2

Low carbon steel square nuts are designed for light-duty fastening. They are cost-effective and practical for general construction, equipment assembly, and furniture applications. Their square design improves grip and resistance to turning.

Stainless Steel 18-8

Stainless 18-8 provides corrosion resistance and strength, making it ideal for marine, outdoor, and chemical environments. These square nuts deliver long-lasting fastening performance in demanding applications.

Machine Screw Steel

Steel used for machine screw nuts provides consistency and reliability in small, delicate assemblies. These nuts are common in electronics, equipment repair, and appliances where precision fastening is required.

Available Finishes

South Coast Fasteners offers square nuts in finishes designed to protect against wear and environmental damage.

Plain

Plain square nuts are untreated and best suited for dry, indoor applications. They provide reliable fastening at low cost in furniture, equipment, and light construction.

Zinc Clear CR+3

Zinc clear plating provides resistance to rust and a clean metallic appearance. It is widely used in machinery, construction, and industrial assemblies where moderate protection is required.

Hot-Dip Galvanized

Hot-dip galvanized square nuts are coated with thick zinc for superior corrosion resistance. They are used in outdoor structures, fencing, and utility equipment where fasteners must withstand weathering.

Stainless Steel 18-8

The natural finish of stainless 18-8 steel provides excellent corrosion resistance without additional coatings. It is ideal for marine, outdoor, and chemical environments where durability is a priority.

Why Choose South Coast Fasteners?

South Coast Fasteners supplies square nuts that combine dependable strength with broad surface contact for secure fastening. With multiple materials and finishes available, we provide solutions for furniture, equipment, construction, and marine projects. Customers rely on our expertise and stocked inventory for fast, dependable service.

Order Square Nuts Online Today

Order square nuts online today with South Coast Fasteners and get the grade, material, and finish you need delivered quickly. Whether for restoration, construction, or industrial applications, our inventory ensures your project gets reliable fastening support.