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SKU: ABW516-316SS

5/16" Conquest USS Flat Washer - 316 Stainless Steel

5/16" Conquest USS Flat Washer - 316 Stainless Steel!

  • 5/16" Conquest USS Flat Washer - 316 Stainless Steel

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Nuts and Washers
SKU: ABW516-316SS

5/16" Conquest USS Flat Washer - 316 Stainless Steel

$0.12
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Ships Jun 25 when you order now

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: 5/16"
Thickness: 0.043" - 0.057"
Outside Diameter: 0.745" - 0.760"
Inside Diameter: 0.340" - 0.355"
Thread Type: Coarse
Material: 316 Stainless Steel
Type: 316 Stainless Steel
Measuring System: USS
Manufacturer Name: Conquest Fasteners
Quantity: Single
Description

5/16" Conquest USS Flat Washer – 316 Stainless Steel

This 5/16" USS washer features high-performance 316 stainless steel for use in corrosive or high-moisture environments. Its broad bearing surface distributes load evenly, helping prevent damage to mounting materials. Built to USS standards, it’s a trusted part in marine, chemical, and outdoor construction. A reliable fit with 5/16" coarse-thread stainless bolts and nuts.

Ensure fasteners and washers share the same material and finish for proper fit and corrosion resistance.

5/16" Stainless USS Washer for Coastal and Chemical Builds

Use this washer in framing, rail systems, or chemical facility installs where rust isn’t an option. It performs under constant exposure to humidity, salt, or corrosive agents. USS sizing gives your hardware more support with less risk of pull-through. A field-tested option for long-lasting strength and protection.

Key Features

  • 316 Stainless: Premium grade for high-corrosion environments.
  • USS Spec: Wide OD and thicker build for tough installs.
  • Precision Fit: Compatible with 5/16" coarse-thread bolts.
  • Long-Term Performance: Resists pitting and chemical damage.
  • All-Weather Use: Suitable for year-round outdoor exposure.

Common Applications

  • Handrails and fencing
  • Outdoor brackets and mounts
  • Food and beverage equipment
  • Mechanical enclosures
  • Chemical processing units

Installation Tips

  • Use with matching nuts and bolts made from 316 stainless steel.
  • Position washer flat under the nut or bolt head.
  • Torque fasteners evenly for maximum seal and load distribution.
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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 9 reviews
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W
WILLIAM WAY JR
Excellent!

I purchased a few 7" SS bolts, nuts and washers for them for my boat. The order total was minimal and it was online and my first time using Fasteners Plus, so I wasn't sure when or if I would get them. However.....there were constant email updates from order acceptance to delivery and everything came well packaged and in good form. If my experience is indicative of their usual service, they are top notch and I run an aerospace fastener business for a living.

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.

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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.