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Copper Flat Washer, Plain Finish, 5/16" Screw Size, 0.34" ID, 3/4" OD, 0.065" Thick (Pack of 25)

4.5 4.5 out of 5 stars 20 ratings
Currently unavailable.
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Material Copper
Outside Diameter 0.750' Inches
Washer Type Flat
Exterior Finish Copper
Fastener Size 5/16"

About this item

  • The package length is 10.16 centimeters
  • The package height is 0.508 centimeters
  • The package width is 7.62 centimeters
  • Package Weight : 0.15 pounds

Product details

  • Package Dimensions ‏ : ‎ 4 x 3 x 0.2 inches; 0.01 ounces
  • Item model number ‏ : ‎ B009OJUK3U
  • Date First Available ‏ : ‎ October 31, 2012
  • Manufacturer ‏ : ‎ Small Parts
  • ASIN ‏ : ‎ B009OJUK3U
  • Customer Reviews:
    4.5 4.5 out of 5 stars 20 ratings

Product Description

The copper flat washer has a plain finish. The flat washer provides a bearing surface for fastener load distribution or is used as a spacer between components. Copper provides corrosion resistance and electrical conductivity. The material is nonmagnetic.

Washers distribute the load of a fastener across a surface and can also be used as spacers, springs, shims, or locking devices. Several different washer styles fit a variety of application and installation requirements. The most common style is a flat washer. More specialized washers provide additional benefits. A cup washer, for example, helps protect fasteners from electrical currents, while a lock washer offers additional security in an assembled workpiece.

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Customer reviews

4.5 out of 5 stars
4.5 out of 5
20 global ratings

Top reviews from the United States

Clinton J Wright
5.0 out of 5 stars As described
Reviewed in the United States on August 10, 2021
Verified Purchase
This is exactly what I needed. I have an extended-length show head adapter that kept falling over with the rubber gasket supplied. I did have to adjust the OD of this washer to fit the connection. but that head has not fallen over since and no leaks.
All in all, they seem to be pure copper and will work for their intended purpose.
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agsb
5.0 out of 5 stars It is made of Copper
Reviewed in the United States on September 3, 2021
Verified Purchase
I like the fact it is made of copper because copper conducts electricity better than just plain iron and it was meant to be used where on a solenoid that carries electrical current. The solenoid works much better with a copper washer instead of iron.
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Dave
5.0 out of 5 stars They worked as expected. I even had to buy another pack of 25.
Reviewed in the United States on August 30, 2019
Verified Purchase
I used these to help get better contact as I assembled a 16 cell LiFePo4 Lithium battery for my solar system. One was needed one one post of each cell for better contact (The second terminal has a copper face). I also needed to use some to help get the best contact on many other connections in the system.
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Tony Taylor
3.0 out of 5 stars Needs Corrosion Protection
Reviewed in the United States on December 21, 2013
Verified Purchase
I got these as part of a project to put my battery in my trunk. The Mustang needs all the help it can get in terms of weight distribution. The bag they came in is heat sealed, but 4 or 5 of them show some dark oxidation or corrosion. I only need a few, so it is no big deal for me, but for someone else it might be. Otherwise they will do their job just fine.
One person found this helpful
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