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I'm rather intrigued by these washers: enter image description here enter image description here

What are they called?

Dehbop
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3 Answers3

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It's a serrated lock washer. I've seen them used for two purposes:

  1. Locking the nut in cases of vibration.
  2. Ensuring a electrical bond on painted or corroded metal.

Or, of course, a combination of the two. They are mildly effective against vibrations, and properly torqued very effective to ensure an electrical connection.

vidarlo
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They're anti-vibration locking washers, the teeth digging into both the nut and whatever it's holding. They are also available with the teeth on the inside (as the pic), rather than as shown above, the outside.

enter image description here

Tim
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4

They are spring locking washers.

They are designed such that the "teeth" oppose the nut vibrating loose.

Solar Mike
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