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Coupling Nuts
Your Supplier for High-Performance Industrial Fasteners
If you're looking for a trusted supplier of wholesale industrial fasteners, South Coast Fasteners is your solution. Contact our Anaheim, CA office to learn more about our product options and how we can support your project needs. For helpful service, fast order turnaround, and high-quality fasteners in bulk or small batches, choose South Coast Fasteners.Types of Coupling Nuts We Offer
A563 Grade A Hex Coupling Nut, Plain
These plain Grade A coupling nuts are designed for light-duty connections and general-purpose fastening. The plain finish makes them suitable for indoor environments such as machinery assembly, maintenance, and light construction projects. Their elongated hex design allows for easy installation with standard wrenches.
A563 Grade A Hex Coupling Nut, Zinc CR+3
These nuts combine Grade A strength with a zinc clear coating for corrosion resistance. They are widely used in HVAC systems, equipment repair, and light industrial applications where exposure to moisture may occur. The zinc finish also enhances appearance, making them suitable for visible assemblies.
A563 Grade A Hex Coupling Nut, HDG
Hot-dip galvanized coupling nuts provide Grade A strength with superior corrosion protection. They are commonly applied in construction, utility, and outdoor assemblies where long-term durability is required. The thick zinc layer ensures performance in environments exposed to weathering.
Metric Class 6 Hex Coupling Nut, Zinc CR+3
These metric coupling nuts meet Class 6 strength standards and feature a zinc clear finish for corrosion resistance. They are widely used in European and international construction, equipment, and machinery applications. Their elongated shape supports secure joining of threaded rod in metric assemblies.
Material Options
South Coast Fasteners stocks coupling nuts in materials designed to provide both strength and application flexibility.
Low Carbon Steel (Grade A)
Low carbon steel is used for Grade A coupling nuts, delivering dependable strength at an economical cost. These nuts are suitable for light to medium-duty projects, including construction and general mechanical use.
Metric Class 6 Steel
Metric Class 6 steel provides consistent performance for international projects. It balances strength and machinability, making it ideal for connecting threaded rod in machinery, structural work, and OEM equipment.
Available Finishes
South Coast Fasteners offers coupling nuts in finishes that protect against corrosion and extend service life.
Plain
Plain coupling nuts are untreated, making them cost-effective for dry, indoor environments where corrosion is not a concern.
Zinc Clear CR+3
Zinc clear plating provides corrosion resistance and a clean metallic finish. It is suitable for assemblies in light construction, HVAC, and machinery.
Hot-Dip Galvanized
Hot-dip galvanized coupling nuts are coated with a thick layer of zinc for superior corrosion protection. They are designed for outdoor and structural applications where long-term durability is essential.
Why Choose South Coast Fasteners?
South Coast Fasteners supplies coupling nuts that deliver the strength and reliability required for both light-duty and structural assemblies. With multiple grades, metric options, and protective finishes available, our inventory supports industries ranging from construction to mechanical repair. Customers rely on us for dependable products and knowledgeable support.
Order Coupling Nuts Online Today
Order coupling nuts online today with South Coast Fasteners and get the right grade, finish, and size delivered quickly. Whether you need them for construction projects, HVAC systems, or industrial equipment, our stocked supply ensures you get what you need without delay.