Flat Washers for Screws and Fastener Assemblies

It's a small part that does a big job. Flat washers improve load distribution, protect surfaces from damage, and prevent fastener pull-through — all critical in professional construction. The Contractors Site supplies flat washers for screws, bolts, and lag applications across a full range of sizes and materials.

Drill bit being screwed into a wooden surface with a drill.

Distribute the Load. Protect the Surface.

Under a bolt head or nut, a washer spreads clamping force over a larger area — reducing the risk of pulling through soft materials, crushing engineered products, or damaging finished surfaces. In construction, that matters on everything from ledger connections to exterior cladding fastening.

Jar of construction screws with a label on a wooden surface
$19 - $58.50
Total:
Jar of construction screws with a clear lid on a wooden surface
$22.75 - $76
Total:
Clear Plastic Jar of Square Drive Deck Screws
$25.25 - $75.50
Total:
Clear Plastic Jar of 8 x 3 Inch Square Drive Deck Screws
$17 - $58.50
Total:
Large Jar of Square Drive Brown Drywall Screws
$13.75 - $16.50
Total:
Plastic Jar of Coarse Thread Drywall Screws
$15.75 - $59.50
Total:
dahl Quick-Grip Angle Supply Stop Valve
$3.85 - $360
Total:
Twist N Lock Self-Drilling Drywall Anchors
$29
Total:
Hillman Paulin 3/8-inch Hot Dipped Galvanized Hex Head Lag Bolts for Heavy-Duty Wood Construction and Decking
$25.25 - $75.50
Total:
Hillman Paulin 3/8-inch Hot Dipped Galvanized Hex Head Lag Bolts for Heavy-Duty Wood Construction and Decking
$16 - $88
$12.50
Total:
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Steel, Galvanized, and Stainless Options

We stock washers in the materials that match real job site conditions — standard steel for interior work, galvanized for exterior and treated lumber applications, and stainless steel for the builds where long-term corrosion resistance is non-negotiable.

Collection of tools including pliers, screwdrivers, and wrenches on a textured surface
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Great Quality - Fair Pricing.

The fasteners I bought from here are solid and reliable. You can tell these are contractor-grade products, not cheap knock-offs.


Amanda R., Builder

Exactly what I needed.

The Blind Mark Locator worked perfectly for my drywall project. No guessing, no mistakes. Makes the job fast and professional.

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My go-to supplier now.

I love that I can find everything in one place. Composite decking, tapes, adhesives—all quality stuff. This site is a lifesaver for contractors.

Daniel P., Renovation Specialist

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Frequently Asked Questions

We specialize in high-quality tools for calculating, measuring, leveling, and locating, essential for contractors and professionals in the construction industry. Our inventory includes laser measures, levels, stud finders, measuring tapes, and more.

Yes, our tools are designed to meet the needs of both professional contractors and DIY enthusiasts.

Our tools are precision-engineered for accuracy, meeting industry standards for professional use.

Our tools are built with high-quality materials to ensure they can withstand tough working conditions.

Yes, most of our products come with a manufacturer’s warranty. Please refer to the product description for specific warranty details.

Simply browse our product catalog, select the tools you need, and add them to your cart. Once ready, proceed to checkout, where you can complete your purchase securely.

Absolutely! Our customer service team is available to provide recommendations and answer any questions you may have about our tools.