ThePipingMart Blog Fasteners Crush Washer vs Copper Washer – What’s the Difference

Crush Washer vs Copper Washer – What’s the Difference

Crush Washer vs Copper Washer

When it comes to maintaining your vehicle, every small part counts. Even something as small as a washer can make a big difference. If you’re replacing your oil pan or drain plug, you may have encountered two types of washers – crush and copper washers. But which one is better for your vehicle? In this blog post, we’ll look at the differences between the two and help you decide which option is best for you.

What is Crush Washer?

If you’ve ever changed the oil on a car or worked on a firearm, you may have heard the term “crush washer.” So, what exactly is a crush washer and what purpose does it serve? Well, a crush washer is a soft metal gasket that is used to create a tight seal between two hard surfaces. It is called a crush washer because it is compressed or “crushed” when it is tightened between the two surfaces. Crush washers are commonly used in automotive applications, such as oil pan drains and brake calipers, as well as in guns for muzzle devices and other components. The key to a crush washer’s effectiveness is its ability to deform enough to create a secure seal, without losing its shape or breaking. So, the next time you encounter a crush washer, you can appreciate its important role in keeping your vehicle or firearm running smoothly.

What is Copper Washer?

Copper washers may not be the most glamorous or attention-grabbing items in your toolkit, but they are definitely a crucial part of keeping your machine running smoothly. These small, flat pieces of metal fit snugly between two surfaces to create a tight seal and prevent leaks. They are most commonly used in plumbing and automotive applications, but can be found in countless other industries as well. Despite their simple design, copper washers are incredibly durable and long-lasting, ensuring that your machines stay leak-free for years to come. So next time you replace a faulty gasket or seal, don’t forget the tiny but mighty copper washer.

Difference Between Crush Washer and Copper Washer

  • Crush washers are made of a softer metal than copper washers so that they can be compressed more easily.
  • Copper washers are better at sealing than crush washers, so they’re often used in applications requiring a tight seal.
  • Crush washers are less likely to damage the surface they’re being tightened against than copper washers.
  • Copper washers are more expensive than crush washers.
  • Crush washers, such as oil drain plugs, are typically used when a seal is not as critical.


In conclusion, choosing between a crush washer and a copper washer ultimately comes down to the specific application you’re working with. Both types of washers provide a tight seal but have different advantages and disadvantages. A crush washer may be the best choice if you’re looking for a one-time-use option that provides a tight seal and prevents leaks. If you’re looking for a reusable option or are working with a high-temperature application, a copper washer may be a better choice. Whatever option you choose, make sure you choose the right size washer for your application to ensure a tight seal.

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