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SKU: ABW12-SS

1/2" Conquest USS Flat Washer - 18-8 Stainless Steel

1/2" Conquest USS Flat Washer - 18-8 Stainless Steel!

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Nuts and Washers
SKU: ABW12-SS

1/2" Conquest USS Flat Washer - 18-8 Stainless Steel

$0.50
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Diameters:

1/4" 5/16" 3/8" 1/2" 5/8" 3/4" 7/8" 1"

Type:

18-8 Stainless Steel 316 Stainless Steel

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Specifications

Diameter: 1/2"
Thickness: .086" - .132"
Outside Diameter: 1.368" - 1.405"
Inside Diameter: .557" - .577"
Thread Type: Coarse
Material: 18-8 Stainless Steel
Finish: Plain
Type: 18-8 Stainless Steel
Measuring System: USS
Manufacturer Name: Conquest Fasteners
Quantity: Single
Description

1/2" Conquest USS Flat Washer - 18-8 Stainless Steel

This 1/2" USS flat washer is a rugged solution for medium- to heavy-duty applications in corrosive environments. Crafted from 18-8 stainless steel, it provides the strength to support large fasteners while resisting rust, pitting, and chemical degradation. Its wide surface helps stabilize connections and prevent bolt heads or nuts from damaging underlying materials. Perfect for exposed fastenings in structural, industrial, or marine settings.

Always confirm washer and bolt compatibility prior to installation for optimal load distribution.

1/2" USS Flat Washer – Reliable in Harsh Conditions, Built to USS Standards

Count on this washer when strength and corrosion resistance are critical to the success of your build. It works anywhere durability and surface protection are required.

Key Features

  • Premium Stainless Build: Made from 18-8 alloy to endure moisture, heat, and chemical exposure.
  • Enhanced Load Spread: Protects softer materials under compression.
  • Precision-Machined: Sized for 1/2" coarse-thread fasteners.
  • Wide-Diameter Profile: Reinforces joints under torque and load.
  • Indoor/Outdoor Ready: Performs in kitchens, shipyards, framing, and more.

Common Applications

  • Outdoor framing and marine docks
  • Food-safe environments
  • Heavy-duty HVAC systems
  • Deck railing and baluster installations
  • Machine frame assembly

Installation Tips

  • Pair with 18-8 stainless bolts for long-term corrosion protection.
  • Ensure flush contact to distribute clamping force evenly.
  • Tighten gradually to avoid warping materials or overloading threads.
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× WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects and other reproductive harm. For more information visit: www.P65Warnings.ca.gov.

Customer Reviews

Based on 8 reviews
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M
MICHAEL O'DONNELL
Excellent Quality, On Time and Great Price

Could not find what I needed locally, Fasteners Plus had it and got it to me promptly. Thanks for your excellent service and products.

D
Don Cordell Ward
Bat House Latch

All of the hardware we use is 316 Marine Grade Stainless Steel. Our bird homes and bat houses are exposed to the elements 24-7 year round. Some are placed on coastal properties where salt air is hard on metals. We bought and have previously bought some of our supplies from these folks. They’ve always been friendly and professional with us.

P
Patrick Heffernan
Great service

All items arrived in good condition and as promised - with the exception of one through-bolt which had "escaped" the packaging (through a hole in the cardboard box). I called customer service and they shipped out a replacement the same day and we received it (well packaged) in no time, so without impact on our timeline. Definitely an easy and no hassle experience.

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    Our multiple distribution centers allow us to reach nearly 80% of the U.S. within 1-2 business days for all in-stock items. With thousands of items in stock & ready to ship, orders placed before 4:00pm CST ship out the same day.

  •

    Our Iowa-based 23,000 square foot manufacturing facility was carefully crafted for the high quality, custom production of tie-down straps and chains, lifting slings, cargo nets, and more. Your vision brought to life.

  •

    As employee-owners, we take customer service very seriously. Our team members are dedicated, professionally-trained, and have decades of combined experience serving the industry. Always speak with a real person and never wait more than 1 business day.