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Description

Type 18-8 and 316 Stainless Steel

Sold by the piece

Features/System Components:

  • Even Clamping Load Distribution: Distributes force over a broad bearing surface to prevent bolt heads and nuts from crushing, splintering, or sinking into wood fibers when under tension.
  • Dual Corrosion-Resistant Grades: Available in 18-8 stainless steel for everyday outdoor durability and marine-grade 316 stainless steel for maximum protection in saltwater, chemical, and coastal environments. 
  • Filling in the Gaps: Stainless steel flat washers can be used to compensate for oversized or slotted clearance holes across timber joints.
  • Flexible Quantity and Bulk Savings: All flat washer sizes are sold individually for custom project needs, with automatic volume discounts available on orders of 100 stainless steel washers or more.

Flat Washers, Stainless Steel

Product form

SKU: A120

Built for high-load durability and long-term corrosion resistance, stainless steel flat washers are essential for wood construction. They prevent stainless nuts and bolts from damaging lumber while also ensuring even load distribution. Stainless steel washers help maintain structural integrity without rusting or staining.

$0.08

Free pickup in our shop(s)
Volume pricing

Buy 100 for $0.07 each

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    Wide Variety of Hard-to-find Stainless Steel Fasteners

    Description

    Type 18-8 and 316 Stainless Steel

    Sold by the piece

    Features/System Components:

    • Even Clamping Load Distribution: Distributes force over a broad bearing surface to prevent bolt heads and nuts from crushing, splintering, or sinking into wood fibers when under tension.
    • Dual Corrosion-Resistant Grades: Available in 18-8 stainless steel for everyday outdoor durability and marine-grade 316 stainless steel for maximum protection in saltwater, chemical, and coastal environments. 
    • Filling in the Gaps: Stainless steel flat washers can be used to compensate for oversized or slotted clearance holes across timber joints.
    • Flexible Quantity and Bulk Savings: All flat washer sizes are sold individually for custom project needs, with automatic volume discounts available on orders of 100 stainless steel washers or more.

    Specifications
    Inside diameter
    .281"
    Material
    Type 18-8 Stainless Steel
    Nominal thickness
    0.050"
    Outside diameter
    5/8"
    Sold as
    each
    Use for
    Outdoor Applications

    Frequently Asked Questions

    What are flat washers used for?

    They are used to evenly distribute load across the entire bearing surface and prevent nuts and bolts from loosening once fastened. They’re also a barrier between the fasteners and the pieces being fastened.

    What is the difference between 18-8 and 316 stainless steel flat washers?

    Both stainless steel washer types are made up of chromium and nickel, but Grade 316 washers also contain molybdenum. This results in greater corrosion resistance, making these washers appropriate for oceanfront and coastal environments and areas that come in contact with chemicals and chlorides like pool decks.

    Can stainless steel flat washers be used in marine applications?

    We recommend Grade 316 for use in marine applications. 18-8 stainless steel washers are suitable for general outdoor use.

    Reviews & Q&A

    Customer Reviews

    Based on 7 reviews
    71%
    (5)
    14%
    (1)
    0%
    (0)
    0%
    (0)
    14%
    (1)
    A
    Anonymous

    They were exactly what I needed

    T
    Tony Osborne
    Got the wrong item

    Got the wrong item. Expensive! Never again!

    Hi Tony-
    I apologize for the mistake. We are reaching out to you now. In the future, if you experience an issue with an order, please contact us directly so we may understand the issue and correct it right away. Our email is info@manasquanfasteners.com

    P
    Peter
    Quick response

    Quick response. My go to vendor for SS hardware...

    K
    Kurt
    Great Hardware!

    Everything I received was as described and quickly delivered. All the parts assembled perfectly. Time will tell the story but I expect I'll be happy for years to come

    J
    Jeanie
    MS.

    Quick delivery, nice product, very pleased.

    12

    Ready to Build? Find the Right Stainless Steel Flat Washers for Your Project

    Whether you’re a professional contractor or a DIY weekender, having the right hardware is essential for a job well done. Pair high-performance stainless steel washers with our premium stainless nuts and bolts for projects that stand the test of time even in harsh coastal environments. Explore our full inventory online, and take advantage of bulk savings when you stock up. Plus, enjoy fast shipping directly to your home or jobsite anywhere in the country, including Alaska and Hawaii. Save more with free shipping on online orders of $250+ from Manasquan Fasteners.

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