$199 away from FREE SHIPPING
SKU: ABW38-316SS

3/8" Conquest USS Flat Washer - 316 Stainless Steel

3/8" Conquest USS Flat Washer - 316 Stainless Steel!

  • 3/8" Conquest USS Flat Washer - 316 Stainless Steel

Continue Browsing

Nuts and Washers
SKU: ABW38-316SS

3/8" Conquest USS Flat Washer - 316 Stainless Steel

$0.21
Request Bulk Pricing
Request Bulk Pricing
Ships today when you order in the next 9 hours 55 minutes

Diameters:

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

Type:

18-8 Stainless Steel 316 Stainless Steel

Blazing Fast Shipments

Shipping & Returns

Tailored Business Programs

Partner with Us

Questions?

We can help!

Payment Options

American Express
Apple Pay
Discover
Google Pay
Mastercard
PayPal
Shop Pay
Venmo
Visa

Specifications

Diameter: 3/8"
Thickness: 0.043" - 0.057"
Outside Diameter: 0.995" - 1.010"
Inside Diameter: 0.399" - 0.416"
Thread Type: Coarse
Material: 316 Stainless Steel
Type: 316 Stainless Steel
Measuring System: USS
Manufacturer Name: Conquest Fasteners
Quantity: Single
Description

3/8" Conquest USS Flat Washer – 316 Stainless Steel

This 3/8" USS flat washer is built from 316 stainless steel to withstand tough marine, chemical, or outdoor environments. Its extra-wide diameter helps spread load across larger areas, reducing fastener stress. Ideal for structural, mechanical, or industrial use. Compatible with 3/8" coarse-thread stainless bolts and nuts.

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

3/8" Stainless USS Washer for High-Exposure Fastening

Use this washer to reinforce joints exposed to vibration, moisture, or corrosive agents. It maintains integrity even after years in harsh conditions. USS sizing ensures strong surface coverage and lasting stability. A go-to part in decks, plants, and marine projects.

Key Features

  • Corrosion Resistant: 316 stainless ideal for water and chemical exposure.
  • USS Pattern: Covers more area for added reinforcement.
  • Fits Standard Bolts: Made for 3/8" coarse-thread fasteners.
  • Strength Under Load: Performs under vibration and tension.
  • Marine and Industrial Rated: Built for jobsite longevity.

Common Applications

  • Seaside framing projects
  • Outdoor HVAC installs
  • Pump or tank brackets
  • Corrosive environment equipment
  • Food-grade machinery

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.
More
View full details

Continue Browsing

Nuts and Washers

× 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
100%
(9)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
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.

123
  •

    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.