Structural and Heavy Hex Nuts

Types of Structural and Heavy Hex Nuts We Offer

2H Heavy Hex Nut, A194/SA 194, Plain

These heavy hex nuts are manufactured to A194/SA 194 standards and built for high-pressure and high-temperature service. They are relied on in refineries, petrochemical plants, and structural assemblies where strength is critical. The plain finish makes them practical for controlled environments where corrosion is not a concern.

2H Heavy Hex Nut, A194/SA 194, Plain, Taiwan/Korea

Produced to meet the same A194/SA 194 standards, these heavy hex nuts are sourced internationally. They are dependable for high-stress applications in global industrial projects and structural steel assemblies. The plain surface provides consistent performance in dry or indoor settings.

2H Heavy Hex Nut, A194/SA 194, Zinc CR+3

These nuts provide A194/SA 194 strength with added corrosion resistance from a zinc clear coating. They are common in heavy equipment, infrastructure, and industrial construction where protection against moisture and wear extends service life.

2H Heavy Hex Nut, A194/SA 194, HDG

Hot-dip galvanized 2H nuts are designed for exposed structural use. The thick zinc coating provides excellent resistance against corrosion, making them essential in bridge construction, utility structures, and outdoor steelwork. Their durability ensures reliable performance in weathered environments.

USA 2H Heavy Hex Nut, A194/SA 194, Plain

These plain heavy hex nuts are built to A194/SA 194 specifications and manufactured domestically. They provide the same high-pressure, high-temperature reliability expected from the 2H grade. Their plain finish suits use in dry, clean, or indoor conditions.

USA 2H Heavy Hex Nut, A194/SA 194, Zinc CR+3

These heavy hex nuts pair A194/SA 194 strength with zinc clear plating for corrosion resistance. They are commonly applied in construction, industrial equipment, and large-scale projects where additional protection is needed.

USA 2H Heavy Hex Nut, A194/SA 194, HDG & Colored Wax

These nuts combine a hot-dip galvanized coating with wax for lubrication and colored identification. The design makes installation easier while helping differentiate fastener sets during field assembly. They are widely used in steel construction and infrastructure projects.

Metric Heavy Hex 2H Nut, A194M/SA 194M, Plain

These metric heavy hex nuts meet A194M/SA 194M standards. They provide reliable fastening strength for international structural applications. Their plain finish is suitable for use in clean or controlled conditions.

A563 Grade A Heavy Hex Nut, Plain

Grade A heavy hex nuts are designed for general structural fastening. They are often paired with low-carbon bolts for lighter-duty structural connections. The plain surface makes them economical for indoor applications or projects where corrosion resistance is unnecessary.

A563 Grade A Heavy Hex Nut, Zinc CR+3

These nuts combine Grade A strength with zinc clear plating for added corrosion protection. They are frequently used in construction, commercial projects, and light structural steelwork. The finish improves durability where humidity or light exposure is present.

A563 Grade A Heavy Hex Nut, Zinc Yellow CR+6

Grade A zinc yellow nuts offer corrosion resistance along with improved visibility. They are common in electrical, light construction, and mechanical applications where identifying fasteners quickly is important.

A563 Grade A Heavy Hex Nut, HDG

Hot-dip galvanized Grade A nuts are built for outdoor structural projects. Their zinc coating provides years of protection against rust, making them ideal for fences, poles, and exposed frameworks.

A563 Grade C Heavy Hex Nut, Plain

Grade C heavy hex nuts are heat-treated for additional strength compared to Grade A. They are suited for structural steel applications, bridge construction, and heavy-duty assemblies. The plain finish is most effective in dry environments.

A563 Grade C Heavy Hex Nut, Zinc CR+3

These nuts provide the strength of Grade C along with zinc clear plating for corrosion resistance. They are widely used in structural frameworks, construction, and equipment manufacturing where moderate environmental exposure is expected.

USA A563 Grade C Heavy Hex Nut, Plain

These heavy hex nuts meet A563 Grade C requirements. Their plain finish is practical for dry or protected environments. They are commonly used in structural steelwork and heavy-duty assemblies.

A563 Grade DH Heavy Hex Nut, Plain

Grade DH heavy hex nuts are among the strongest structural fasteners available. They are used in demanding structural applications such as bridges, energy plants, and heavy machinery. The plain surface is suited for shop fabrication or protected use.

A563 Grade DH Heavy Hex Nut, HDG / Wax & Blue Dye

These nuts combine high-strength Grade DH with hot-dip galvanizing, wax, and blue dye. The galvanizing protects against corrosion, the wax eases installation, and the dye helps identify grade during inspection. They are trusted in bridge and infrastructure projects.

USA A563 Grade DH Heavy Hex Nut, Plain

These heavy-duty plain nuts meet A563 Grade DH specifications. They are designed for high-strength applications such as industrial equipment and construction steelwork. Their plain finish makes them best for indoor or fabrication shop use.

USA A563 Grade DH Heavy Hex Nut, HDG & Wax

These heavy hex nuts combine A563 DH strength with hot-dip galvanizing and wax lubrication. The zinc coating extends corrosion resistance while the wax simplifies installation. They are ideal for outdoor steel construction and long-term assemblies.

Material Options

South Coast Fasteners stocks structural and heavy hex nuts in materials chosen for durability, strength, and compliance with industry standards. These materials ensure fasteners can withstand high loads, vibration, and extreme service conditions.

Medium Carbon Steel (Grades A and C)

Medium carbon steel provides toughness and strength for structural fastening. These nuts are widely used in steel frameworks, heavy equipment, and construction projects where dependable connections are essential.

Quenched and Tempered Steel (Grades DH and 2H)

Hardened steel ensures maximum load capacity and resistance to deformation. These nuts are critical for bridges, refineries, and high-stress industrial environments. Their strength and toughness provide long-term reliability.

Alloy and Specialty Steels

Some heavy hex nuts are produced in alloy or specialty steels to meet unique application requirements. These materials provide additional resistance to wear, temperature, and environmental factors, supporting industries such as petrochemical and power generation.

Available Finishes

South Coast Fasteners offers structural and heavy hex nuts in finishes that extend performance and service life. Each finish supports different environmental and project requirements.

Plain

Plain heavy hex nuts provide an untreated surface that is cost-effective and suitable for controlled indoor use.

Zinc Clear CR+3

Zinc clear plating protects against corrosion and provides a clean metallic look. It is effective for assemblies exposed to humidity or moderate environmental conditions.

Zinc Yellow CR+6

This finish provides corrosion resistance and a bright yellow appearance for visibility. It is often used where fastener identification is important.

Hot-Dip Galvanized

Hot-dip galvanized coatings provide maximum protection against corrosion. These nuts are ideal for exposed steel structures, bridges, and utility installations.

Wax and Dye 

Wax coatings reduce installation friction while dye helps inspectors identify grades in the field. These features are especially useful in large-scale steel construction projects.

Why Choose South Coast Fasteners?

South Coast Fasteners provides structural and heavy hex nuts that meet strict specifications for safety and reliability. With a broad range of grades, finishes, and configurations available, our team helps ensure that each fastener matches the load requirements and environmental challenges of the project. Customers trust us for consistent quality and dependable service across industries.

Order Structural and Heavy Hex Nuts Online Today

Order structural and heavy hex nuts online today with South Coast Fasteners and get the grades, finishes, and sizes you need delivered quickly. Whether for construction, infrastructure, or industrial equipment, our stocked inventory supports both large-scale projects and everyday structural applications.