Washers

At South Coast Fasteners, we offer a wide variety of washers tailored to meet the demands of industries ranging from construction and manufacturing to automotive and marine. Whether you need heavy-duty structural washers or corrosion-resistant stainless steel options, our selection delivers the strength and precision your projects require.

Types of Washers

Structural Washers

Structural washers, sometimes called heavy-duty washers, are designed for applications where maximum strength is essential. With a thick profile and larger outer diameter, they spread loads over a wide surface area, reducing the risk of bolt failure or surface damage. They are the standard choice in construction, bridge building, and infrastructure projects where fasteners must endure extreme stress without compromise.

Within this group of washers, F-436 washers provide thru-hardened strength for structural steel connections, while DTI squirter washers add a visual confirmation of proper bolt tension, ensuring compliance and safety in critical builds.

Flat Washers

Flat washers are the most widely used washer type. Simple in design yet critical in function, they protect surfaces and spread load evenly to prevent fastener damage or loosening. Available in multiple sizes, thicknesses, and materials, flat washers are found everywhere from furniture assembly to heavy machinery, proving their versatility across industries.

Flat washers include USS flat washers with their larger diameters for heavy-duty jobs, SAE flat washers with tighter tolerances for automotive and precision work, and fender flat washers with oversized diameters to reinforce softer or thinner materials like sheet metal, wood, and plastics.

Thru-Hardened Flat Washers

Thru-hardened flat washers are heat-treated for higher hardness and strength. This added toughness allows them to resist deformation under heavy loads, making them ideal for demanding applications in automotive manufacturing, heavy equipment, and industrial assembly.

Both USS and fender washers are available in thru-hardened varieties, offering additional durability for jobs where pull-through resistance and surface protection are critical under extreme stress.

Stainless Flat Washers

Stainless flat washers provide corrosion resistance and long-term durability, even in aggressive environments. Common in marine construction, food processing plants, and outdoor projects, stainless washers are trusted where rust resistance and clean performance are required. Grades like 18-8 and 316 ensure flexibility for both general use and specialized conditions.

This family of washers also includes stainless fender washers for wide coverage with rust protection, AN960 and MS15795 washers built to military standards for aerospace, NAS620 washers manufactured to National Aerospace Standards for extreme precision and strength, and bonded neoprene sealing washers that combine stainless steel with a neoprene backing to create airtight and watertight seals.

Lock Washers

Lock washers are engineered to prevent loosening caused by vibration and torque. With split or toothed profiles, they create tension that locks fasteners in place, making them indispensable in machinery, equipment, and structural assemblies that face constant movement or stress.

Stainless Lock Washers

Stainless lock washers add corrosion resistance to vibration-fighting designs, making them the preferred choice in aerospace, marine, and chemical processing environments. They keep connections secure in conditions where both vibration and harsh elements are constant challenges.

Round Plate Washers

Round plate washers provide more load distribution than standard flat washers thanks to their larger outer diameters. They are commonly used in timber construction and framing, where preventing pull-through in softer materials is crucial to structural stability.

Round Malleable Washers

Round malleable washers are made from ductile iron, which allows them to conform to irregular or uneven surfaces. They are used in fencing, railroad construction, and timber applications where strength is necessary but flexibility and adaptability are also important.

Square Washers

Square washers resist rotation during tightening and are designed to spread load across a wide surface. They are often used in wood or softer materials where round washers might embed themselves. Their shape provides additional stability in framing, decking, and structural wood applications.

Countersunk Finishing Washers

Countersunk finishing washers, also called cup washers, are used with countersunk screws to create a flush, finished appearance. They conceal screw heads and provide a smooth surface, making them popular in woodworking, cabinetry, furniture, and architectural detailing where aesthetics matter.

Shear Plate Washers

Shear plate washers, or timber connectors, are heavy-duty washers designed for timber construction. With serrated or toothed surfaces, they grip into wood to distribute loads and resist slipping. They are used in bridge building, decking, and heavy framing where strength and longevity are critical.

Nylon Washers

Nylon washers are lightweight, non-conductive, and chemically resistant. They provide cushioning, electrical insulation, and vibration resistance, making them ideal for automotive, plumbing, and electrical work. Their flexibility makes them a strong choice where metal washers would be too rigid or heavy.

Silicon Bronze Washers

Silicon bronze washers combine corrosion resistance with strength, making them the top choice for marine and coastal applications. They are also valued in architectural and decorative uses where appearance is important. Over time, they develop a natural patina that adds to their character without sacrificing performance.

Applications and Amenities

Washers play a crucial role in nearly every industry and environment. In construction, they secure beams, trusses, and steel connections, ensuring structural integrity in buildings and bridges. Manufacturing relies on washers to protect machinery, distribute loads in assembly lines, and prevent costly failures. Automotive and aerospace industries depend on precision washers like AN960, MS15795, and NAS620 to withstand vibration, torque, and high-performance demands. Marine and offshore operations require corrosion-resistant stainless washers, fender washers, and neoprene-bonded sealing washers that hold up against constant saltwater exposure. Even in everyday home improvement, washers are the unsung heroes that make it possible to mount shelves, secure furniture, and install fixtures with confidence. Whatever the project, washers from South Coast Fasteners add strength, stability, and peace of mind.

Why Choose South Coast Fasteners?

South Coast Fasteners is committed to stocking washers that meet the highest standards for consistency, durability, and performance. Our products are sourced from trusted manufacturers and supported by decades of industry expertise. With fast shipping, knowledgeable guidance, and a deep inventory, we ensure that professionals in every trade can find the washers they need, when they need them. When you choose South Coast Fasteners, you get more than just hardware, you get a trusted partner that understands your work and supports your success.

Order Washers Online Today

South Coast Fasteners makes ordering washers quick and convenient. Browse our extensive inventory online or contact us for help with specifications, sizes, or bulk orders. Whether you’re tackling large-scale infrastructure, building out manufacturing equipment, or completing small repairs, we provide the washers that keep your fasteners secure and your projects moving forward.