When to Use Cupped Washers: What You Should Know | Blog

Cupped washers by Monroe


Cupped washers by Monroe

Cupped washers have change into a preferred various to conventional flat washers. Like all washers, they’re used to distribute the load of a fastener. You’ll be able to safe two or extra objects collectively by driving a threaded fastener, corresponding to a bolt, by way of a washer and the objects, adopted by securing the top with a nut.

With a washer in place, the threaded fastener’s load will likely be distributed over a bigger space, thus defending the objects from harm. Contemplating that flat washers will distribute the fastener’s load as properly, you could be questioning when it’s best to use a cupped washer.

Overview of Cupped Washers

Cupped washers are characterised by their cup-like form. They aren’t utterly flat. As an alternative, cupped washers have a concave floor that faces the fastener with which they’re used.


For fastening purposes by which the joined objects will likely be uncovered to vibrations, you might need to use cupped washers. Cupped washers supply better safety in opposition to vibration-related loosening than flat washers. The concave floor will basically lock them in place. Even when uncovered to frequent vibrations, cupped washers will proceed to carry the objects collectively because of their concave design.

Delicate Components

Chances are you’ll need to use cupped washers when securing delicate elements collectively. Delicate elements, corresponding to gaskets or different mechanical seals, could break beneath the load of a threaded fastener. Driving a fastener by way of a fragile half will expose it to emphasize. A cupped washer, nevertheless, will distribute the fastener’s load throughout a better floor space. The load received’t be concentrated. As an alternative, it will likely be unfold throughout a better floor space.


Some companies use cupped washers for aesthetic functions. Cupped washers supply a cleaner and extra fashionable model than flat washers. Their concave design provides a singular ornamental aspect to them.

Protects Towards Overtightening

One more reason to make use of cupped washers is to guard in opposition to overtightening. Overtightening happens if you tighten a fastener a lot that it damages the objects with which it’s used. As you tighten the fastener, it’s going to press in opposition to the floor of the adjoining object. This strain could trigger the article to crack. Cupped washers shield in opposition to harm corresponding to this minimizing the danger of overtightening. As you tighten the fastener, you’ll really feel the cupped washer flatten out.

In Conclusion

Cupped washers characteristic a singular cup-like form that distinguishes them from flat washers. You need to think about using them for fastening purposes involving vibrations, delicate elements, for aesthetic causes and to guard in opposition to overtightening.


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