Square Washers

South Coast Fasteners, Inc. supplies square washers that provide extra surface coverage and stability in structural assemblies. Unlike standard round washers, square washers distribute loads over a larger area, helping to protect wood, concrete, and steel from crushing or pull-through. They are a trusted choice in framing, foundation anchoring, and heavy construction projects where fasteners need to hold steady under serious stress.

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 Square Washers We Offer

Square Beveled Malleable Iron Washer Plain

Plain square beveled malleable iron washers are built for strength and designed to seat evenly on structural members. Without a protective coating, they are best used in indoor or protected applications where corrosion is not an issue. Contractors use them in timber framing, heavy construction, and infrastructure where a wide bearing surface is needed. Their plain design makes them a cost-efficient option for projects focused on raw strength and stability.

Square Beveled Malleable Iron Washer Zinc Cr+3

Square beveled malleable iron washers with zinc Cr+3 finish combine toughness with corrosion resistance. The zinc coating provides a clean look while protecting against rust in light to medium duty environments. These washers are chosen for structural and mechanical assemblies that require both durability and dependable performance. Builders appreciate their balance of strength and protection.

Square Beveled Malleable Iron Washer HDG

Hot-dip galvanized square beveled malleable iron washers provide maximum corrosion resistance. The thick zinc coating ensures long-term performance even in wet, outdoor, or exposed environments. They are commonly used in infrastructure, timber framing, and dock construction where protection from the elements is essential. Contractors rely on them when heavy-duty fastening must also withstand weathering.

Square Beveled F436 Hardened Washer Plain

Plain square beveled F436 hardened washers are made to handle the demands of high-strength structural bolting. Without coatings, they are intended for indoor or non-corrosive applications. Contractors use them in steel connections where load distribution and bolt tensioning are critical. Their hardened construction ensures they hold up under heavy stress.

Square Beveled F436 Hardened Washer HDG

Hot-dip galvanized square beveled F436 hardened washers combine the toughness of hardened steel with superior corrosion protection. The HDG coating ensures long service life in outdoor or exposed structural projects. These washers are specified for bridges, towers, and other infrastructure where both strength and weather resistance are required. Contractors trust them for critical applications with high loads.

Square Plate Washer Plain

Plain square plate washers provide a wide bearing surface for distributing load on timber or structural members. Without coatings, they are most effective in interior or protected environments. Contractors use them in wood construction and repair where extra support is needed under large bolts. Their simple, rugged design makes them a staple in timber framing.

Square Plate Washer HDG

Hot-dip galvanized square plate washers offer the same large surface area as plain plate washers but with enhanced corrosion resistance. The heavy zinc coating allows them to withstand outdoor, marine, and exposed job site conditions. They are frequently used in dock work, heavy timber construction, and infrastructure where durability is critical. Builders rely on HDG plate washers to provide both strength and longevity.

Material Options

South Coast Fasteners stocks square washers in materials that deliver strength, stability, and performance for everything from general construction to high-load structural assemblies.

Cast Iron

Cast iron square washers are heavy, stable, and widely used in framing and foundation projects. Their weight and rigidity help spread loads across wide surfaces, keeping timber or concrete connections from failing. Builders rely on cast iron when they need washers that can handle the compressive forces of structural anchoring and stand the test of time.

F-436 Hardened Steel

F-436 hardened square washers are heat-treated for strength and toughness, making them ideal for high-load structural applications. Their added hardness resists deformation under heavy stress, ensuring a consistent, secure hold in steel framing, bridges, and infrastructure projects. These washers are often specified in code-compliant builds where strength and reliability cannot be compromised.

Steel

Standard steel square washers provide dependable performance for general-purpose fastening. They are cost-effective and versatile, making them suitable for construction, shop work, and everyday assemblies. Their square shape provides additional bearing surface compared to standard flat washers, giving extra protection in applications that don’t demand hardened materials.

Available Finishes

South Coast Fasteners offers square washers in finishes that provide corrosion resistance, weldability, and long-term performance across different environments.

Zinc Cr+3

Zinc Cr+3 provides a bright, clean finish with solid rust protection. It’s a widely accepted, environmentally compliant coating that works well in construction, industrial assembly, and general projects where both appearance and durability matter.

Hot Dip Galvanized

Hot dip galvanized square washers are built for outdoor and exposed conditions. The heavy zinc coating shields the washer from rust caused by rain, soil, or salt exposure, making them ideal for foundations, marine work, and utility structures. This finish ensures washers remain dependable even after years in service.

Plain

Plain square washers come uncoated, providing a bare steel surface that’s weldable and easy to customize. They’re a common choice for controlled indoor environments, fabrication shops, or applications where a custom finish will be applied after installation.

Why Choose South Coast Fasteners?

South Coast Fasteners carries square washers that are made for real construction needs — built strong, stocked deep, and ready to ship when you need them. We don’t deal in guesswork or filler; we supply hardware that helps jobs move forward. With reliable products and responsive support, we make sure your projects stay on track.

Order Square Washers Online Today

South Coast Fasteners makes ordering square washers simple and efficient. Place your order online or contact us directly for help matching materials, finishes, or anchor setups. With us, you’ll get exactly what you need to keep your build strong and secure.