Custom Plate Washers
Plate washers are thick, square, rectangular, or round washers designed to distribute load over a larger surface area, typically used in heavy-duty structural, anchoring, and timber connection applications. By increasing the bearing surface under a bolt or nut, plate washers help prevent pull-through and reduce stress on wood, concrete, or steel connections.
Valley Nut & Bolt manufactures and supplies custom plate washers in a full range of sizes, thicknesses, materials, and finishes, including hot-dip galvanized for enhanced corrosion resistance in outdoor, marine, and high-moisture environments. Whether you need stock square or round plate washers or a fully custom design to your exact specifications, our in-house fabrication capabilities let us deliver precision parts fast, backed by decades of manufacturing experience.
Why Use a Plate Washer?
Standard washers can crush, split, or pull through soft or thin materials under load. Plate washers solve this by spreading clamping force across a much larger area, making them essential for:
- Anchoring bolts into wood framing or sill plates
- Concrete anchor bolt and rod installations
- Seismic and wind-load structural connections
- Heavy equipment mounting and structural steel connections
Because they develop more surface friction against wood and concrete than standard round washers, plate washers, particularly square styles, are frequently specified in seismic retrofit and timber construction applications.
Shop Plate Washers by Shape
Valley Nut & Bolt supplies plate washers in both square and round profiles to match your engineering specifications:
Square Plate Washers: Square plate washers offer maximum surface area and are the standard choice for timber connections and seismic applications. Available in sizes from 2" to 4"+ and multiple thicknesses.
Round Plate Washers: Round plate washers provide a compact, high-strength bearing surface for structural steel and anchor rod applications where a square profile isn't required or specified.
Not sure which shape fits your project? Contact our team or request a quote and we'll help you spec the right part.
Custom Plate Washer Manufacturing & Supply
As a full-service custom fastener manufacturer and distributor, Valley Nut & Bolt goes beyond stock sizes. Our in-house capabilities include precision cutting, CNC turret punching, forming, and forging, allowing us to produce custom plate washers in non-standard dimensions, hole patterns, and thicknesses to meet unique project requirements.
We also offer in-house hot-dip galvanizing, so custom and stock plate washers can be finished and shipped without relying on third-party vendors, helping us hold tighter lead times for contractors and fabricators nationwide.
Learn more about our custom manufacturing capabilities
Materials & Finishes
Plate washers are available in:
- A36 carbon steel for standard structural applications
- Stainless steel for corrosion-resistant environments
- Plain/black finish for general indoor use
- Hot-dip galvanized, recommended for outdoor, marine, or high-corrosion environments
Need help selecting the right finish for your environment and load requirements? Contact our team, we're happy to advise based on your application.
What is a plate washer used for?
Plate washers distribute the clamping load of a bolt or nut over a much larger surface area than a standard washer. They're commonly used to anchor bolts into wood or concrete, in seismic bracing, and in structural steel connections where preventing pull-through or crushing of the base material is critical.
What's the difference between a square plate washer and a round plate washer?
Square plate washers provide a larger bearing surface and more friction against wood or concrete, making them the preferred choice for timber connections and seismic applications. Round plate washers offer a more compact bearing surface and are often used in structural steel or anchor rod applications where a square profile isn't specified.
Can Valley Nut & Bolt manufacture custom plate washers?
Yes. In addition to stock sizes, our in-house cutting, punching, and forming capabilities allow us to fabricate custom plate washers in non-standard dimensions, thicknesses, and hole patterns to meet your project's exact specifications.
What materials and finishes are available for plate washers?
We supply plate washers in A36 carbon steel and stainless steel, with plain/black or hot-dip galvanized finishes. Hot-dip galvanized is recommended for outdoor, marine, or high-corrosion environments.
What size plate washer do I need for my bolt diameter?
Plate washer size is determined by your bolt or rod diameter, the load requirements of your connection, and the material you're anchoring into, whether wood, concrete, or steel. Our team can help you select the correct size and thickness. Contact us or request a quote with your project specs.
Do you supply plate washers in bulk for construction or infrastructure projects?
Yes. Valley Nut & Bolt distributes plate washers at volume to contractors, fabricators, and industrial customers nationwide, with dedicated fleet distribution across the I-5 corridor for faster regional delivery.
Are your plate washers made in the USA?
Yes, Valley Nut & Bolt manufactures and distributes plate washers domestically, with full product traceability.
Industries Served
- Construction
- Heavy Industrial
- Infrastructure
- Manufacturing
- Government
- Marine
Ready to Explore Our Extensive Range of Products?
Contact Valley Nut & Bolt today to discuss your specific needs and discover how our tailored solutions can enhance your projects.
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