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.

Shop All
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
Square Drive Construction Screws 8 x 3 for Contractors
$19 - $58.50
Jar of construction screws with a label on a wooden surface
250 620794
$19 /each
Cardboard box with H. Paulin & Co. label on a wooden surface
1500 B214-708
$58.50 /each
Total:
Jar of construction screws with a white lid on a wooden surface
Hillman Paulin #8 × 2½-inch Yellow Zinc Square-Drive Construction Screws
$22.75 - $76
Jar of construction screws with a white lid on a wooden surface
350 620793
$22.75 /each
Cardboard box with H.Paulin & Co. Limited branding on a wooden surface
2500 B214-707
$76 /each
Total:
Clear Plastic Jar of Square Drive Deck Screws
Square Drive Deck Screws 8 x 2-1/2 for Deck Builders
$25.25 - $75.50
Clear Plastic Jar of Square Drive Deck Screws
350 620757
$25.25 /each
Red Plastic Tub of Exterior Deck Screws
1200 TCS-DS-8X2.5-1200
$42.50 /each
Cardboard Shipping Box of Bulk Deck Fasteners
2500 B214-526
$75.50 /each
Total:
Clear Plastic Jar of 8 x 3 Inch Square Drive Deck Screws
Hillman Paulin #8 × 3-inch Brown Square-Drive Deck Screws
$17 - $58.50
Clear Plastic Jar of 8 x 3 Inch Square Drive Deck Screws
250 620758
$17 /each
Container of Hillman deck screws with a red lid on a wooden surface
1000 620759
$42 /each
Cardboard box with H.Paulin & Co. label on a wooden surface
1500 B214-527
$58.50 /each
Total:
Hillman #6 × 1-1/4-inch phosphate coarse-thread drywall screws, 1,000-piece jar
Coarse Thread Drywall Screws 6 x 1-1/4 for Pros
$13.75 - $16.50
Hillman #6 × 1-1/4-inch phosphate drywall screws, 500-piece jar
500 - Part 620718 620718
$13.75 /each
Hillman #6 × 1-1/4-inch phosphate coarse-thread drywall screws, 1,000-piece jar
1000 TCS-DWS-6X1.25-1000
$16.50 /each
Total:
Hillman #6 x 1-5/8-inch coarse thread phosphate drywall screws, 500-count plastic jar
Coarse Thread Drywall Screws 6 x 1-5/8 for Contractors – Part 620719
$15.75 - $59.50
Hillman #6 x 1-5/8-inch coarse thread phosphate drywall screws, 500-count plastic jar
500 - Part 620719 620719
$15.75 /each
Hillman #6 x 1-5/8-inch coarse thread phosphate drywall screws, 5,000-count plastic tub
5000 - Part 620716 620716
$59.50 /each
Hillman #6 x 1-5/8-inch coarse thread phosphate drywall screws, 500-count plastic jar
1000 TCS-DWS-6X1-625-1000
$21.50 /each
Total:
Paulin Pro 3/8 × 12-inch structural screws, 50-piece package.
Paulin Pro 3/8 x 12 Truss Head Structural Screws
$3.85 - $360
Paulin Pro truss-head screw with star-drive head detail on a white background
Single Piece TCS-PP-3-8X12-1
$3.85 /each
Paulin Pro 3/8 × 12-inch structural screws, 50-piece package.
Pack of 50 621514
$185 /each
Paulin Pro 3/8 × 12-inch structural screws, 100-piece box
Pack of 100 621574
$360 /each
Total:
Twist N Lock Self-Drilling Drywall Anchors
Self-Drilling Anchors for Professional Contractors
$29
537-356
$29 /each
Total:
Galvanized hex-head lag screw shown from the side with a hex-head detail on a white background
Hillman Paulin - 3/8" x 3" Hex Lag Bolts Steel Galvanized
$25.25 - $75.50
Galvanized hex-head lag screw shown from the side with a hex-head detail on a white background
25 TCS-LB-3-8-HP-3-25
$25.25 /each
Galvanized hex-head lag screw shown from the side with a hex-head detail on a white background
50 TCS-LB-3/8-HP-3-50
$42.50 /each
Galvanized hex-head lag screw shown from the side with a hex-head detail on a white background
100 TCS-LB-3-8-HP-3-100
$75.50 /each
Total:
Galvanized hex-head lag screw shown from the side with a hex-head detail on a white background
3/8" Hex Head Lag Bolts – Hot-Dipped Galvanized Steel
$16 - $88
$12.50
Galvanized hex-head lag screw shown from the side with a hex-head detail on a white background
3 in / 25 TCS-LB-3/8-G-3-25
$16 /each
Galvanized hex-head lag screw shown from the side with a hex-head detail on a white background
3 in / 50 TCS-LB-3/8-G-3-50
$25 /each
Galvanized hex-head lag screw shown from the side with a hex-head detail on a white background
3 in / 100 TCS-LB-3/8-G-3-100
$48 /each
Galvanized hex-head lag screw shown from the side with a hex-head detail on a white background
3-1/2 in / 25 TCS-LB-3/8-G-3-1/2-25
$18 /each
Galvanized hex-head lag screw shown from the side with a hex-head detail on a white background
3-1/2 in / 50 TCS-LB-3/8-G-3-1/2-50
$34.75 /each
Galvanized hex-head lag screw shown from the side with a hex-head detail on a white background
3-1/2 in / 100 TCS-LB-3/8-G-3-1/2-100
$69 /each
Galvanized hex-head lag screw shown from the side with a hex-head detail on a white background
5 in / 25 TCS-LB-3/8-G-5-25
$18 /each
Galvanized hex-head lag screw shown from the side with a hex-head detail on a white background
5 in / 50 TCS-LB-3/8-G-5-50
$37 /each
Galvanized hex-head lag screw shown from the side with a hex-head detail on a white background
5 in / 100 TCS-LB-3/8-G-5-100
$74 /each
Galvanized hex-head lag screw shown from the side with a hex-head detail on a white background
6 in / 25 TCS-LB-3/8-G-6-25
$22 /each
Galvanized hex-head lag screw shown from the side with a hex-head detail on a white background
6 in / 50 TCS-LB-3/8-G-6-50
$44 /each
Galvanized hex-head lag screw shown from the side with a hex-head detail on a white background
6 in / 100 TCS-LB-3/8-G-6-100
$88 /each
Total:
Showing pages 1 of 2

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
Person working on a document with construction materials in the background

Are you a Contractor / Company Owner?

Create an account for exclusive wholesale pricing.

Apply Now

Our Guides

Avoid Home Inspection Delays and Close Your Real Estate Sale Smoothly

Avoid Home Inspection Delays and Close Your Real Estate Sale Smoothly

Sep 17, 2026

Buying or selling a hom...

Unlocking AI's Potential to Elevate Service and Grow Small Businesses

Unlocking AI's Potential to Elevate Service and Grow Small Businesses

Aug 22, 2026

Artificial intelligence...

A woman with an anxious look stares at here computer screen while worrying about what Monday will bring.

Managing Sunday Anxiety with Simple Steps for a Peaceful Week Ahead

Aug 16, 2026

No matter what industry you work in, Sunday can quickly lose its enjoyment when the thought of Monday starts creeping in. ...

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.

— Chris L., Home Improvement Contractor

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

Icon of a delivery truck with 'FREE' text on a white background

Free Shipping Options

Shield icon with a dollar sign in the center on a white background

Top Quality Materials

Icon of a headset with a speech bubble containing three dots on a white background

Contact Us

Black icon of a ribbon with a check mark on a white background

100% Secure Payments

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.