Shop Square Head Bolts Online at South Coast Fasteners

South Coast Fasteners, Inc. provides square head bolts that bring together strength, reliability, and the recognizable square head design that builders continue to trust. These bolts are staples in structural framing, machinery assembly, and restoration projects, where dependable grip and holding power matter as much as appearance. With their balance of utility and classic style, square head bolts remain a preferred fastener across industries.

Reduce Overhead with Competitive Pricing from South Coast 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 Square Head Bolts

A307 Grade A Square Head Bolt, Plain

This A307 Grade A square head bolt is built for reliable fastening in construction, industrial, and restoration projects. The plain finish allows for custom coatings or specific surface treatments as needed. Its classic square head design provides a strong grip and traditional look ideal for timber framing and machinery assembly.

A307 Grade A Square Head Bolt, Zinc CR+3

Featuring a corrosion-resistant Zinc CR+3 coating, this A307 Grade A square head bolt ensures lasting performance in harsh environments. The square head design allows easy wrench grip for secure installation. Ideal for outdoor applications, heavy equipment, and structural projects where rust protection is key.

A307 Grade A Square Head Bolt, HDG

This heavy-duty A307 Grade A square head bolt is hot-dip galvanized (HDG) for superior corrosion resistance. Designed for demanding outdoor and marine environments, it offers long-term durability and strength. Commonly used in bridges, timber structures, and industrial assemblies requiring maximum weather protection.

Square Head Bolts - Material Options

South Coast Fasteners stocks square head bolts in proven material grades that deliver strength, durability, and consistent performance for both new builds and repair work.

Grade A

Grade A carbon steel is the backbone of everyday construction fastening. Known for its dependable performance, it offers a solid blend of strength and workability. Builders rely on Grade A bolts for framing, machinery repairs, and structural reinforcement because the material can handle steady loads without overcomplicating installation. The square head design further improves grip, letting workers apply torque easily with standard tools. If you’re looking for a straightforward, trustworthy material that keeps jobs moving, Grade A carbon steel is the practical choice.

Square Head Bolts - Available Finishes

South Coast Fasteners offers square head bolts in finishes designed to resist corrosion, extend service life, and provide the right look for each application, whether hidden inside a frame or exposed to outdoor conditions.

Hot Dip Galvanized

Hot dip galvanized bolts are built to perform in punishing environments. The thick zinc coating shields the steel against moisture and salt, allowing these bolts to stand up in marine work, outdoor framing, or infrastructure exposed to soil and weather. This finish is rugged and long-lasting, ensuring that fasteners won’t rust out when the stakes are highest. When projects demand a finish tough enough for years in the elements, hot dip galvanized square head bolts are the natural choice.

Plain

Plain finish bolts showcase raw, untreated steel, making them adaptable for a variety of uses. They are well suited for dry indoor settings where corrosion isn’t a threat, or for jobs where a custom finish will be applied on-site. Restoration specialists often choose plain finish bolts when they want to match historical hardware without introducing modern coatings. The simplicity of plain steel also makes it economical and versatile for shops that do their own treatments.

Zinc Cr+3

Zinc Cr+3 delivers a clean, polished look while protecting the steel beneath from corrosion. It’s a widely used finish for construction and industrial projects where hardware isn’t hidden but becomes part of the overall appearance. Contractors value it because it strikes the right balance between durability and presentation — keeping bolts protected while ensuring they look sharp and professional. Whether used in exposed framing, industrial equipment, or general installations, Zinc Cr+3 offers both performance and style.

Why Choose South Coast Fasteners?

South Coast Fasteners supplies square head bolts with the dependable quality and consistent service professionals expect. Our focus is on practical support, stocking the grades and finishes that builders actually use, and providing guidance when you need it. You can count on us for products that hold up under pressure and a team that stands behind every order.

Shop Square Head Bolts Online at South Coast Fasteners

South Coast Fasteners makes ordering square head bolts simple, whether you’re working on a large-scale project or a quick repair. We carry the materials and finishes that keep your work moving, and our team is available to help with sizing, technical details, or bulk pricing. With us, you’ll get the bolts you need and the support to put them to work right away.