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washer

A washer is a thin plate (typically disk-shaped, but sometimes square) with a hole (typically in the middle) that is normally used to distribute the load of a threaded fastener, such as a bolt or nut. Other uses are as a spacer, spring (Belleville washer, wave washer), wear pad, preload indicating device, locking device, and to reduce vibration (rubber washer).
Washers are usually metal or plastic. High-quality bolted joints require hardened steel washers to prevent the loss of pre-load due to brinelling after the torque is applied. Washers are also important for preventing galvanic corrosion, particularly by insulating steel screws from aluminium surfaces. They may also be used in rotating applications, as a bearing. A thrust washer is used when a rolling element bearing is not needed either from a cost-performance perspective or due to space restraints. Coatings can be used to reduce wear and friction, either by hardening the surface or by providing a solid lubricant (i.e. a self-lubricating surface).
The origin of the word is unknown; the first recorded use of the word was in 1346, however, the first time its definition was recorded was in 1611.Rubber or fiber gaskets used in taps (or faucets, or valves) as seal against water leaks are sometimes referred to colloquially as washers; but, while they may look similar, washers and gaskets are usually designed for different functions and made differently.

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  1. R

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  2. B

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  3. R

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  4. O

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  5. P

    blowing in the wind AKA can anybody identify this?

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  6. J

    Replacing washer in old stopcock?

    Doing a bit of preventative maintenance/changing washers etc. and shutting the water on and off a few times, I now have 2 problems (well 2 on this subject :) ). The old stop tap inside the house will no longer shut off the water flow completely and it also weeps from the gland. I would just...
  7. R

    Persistent leak to washing machine inlet hose!

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  8. B

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  9. A

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  10. S

    Mixer tap removal help

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  11. A

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    What washer is required between 1" BSP blank and hot water cylinder? Thanks
  12. S

    Under Tap Chrome Washer

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  13. D

    Water Hammer: new tap or arrestor valve?

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  14. M

    Securing My Shower Bar

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  15. J

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  16. G

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  17. R

    Do i need to change washer in toilet cistern?

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  18. jaydebruyne

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  19. A

    Noisy Tap

    Hi, can anyone help me identify what's causing my hot water tap to be so noisy? I have made a short video which can be viewed here: https://drive.google.com/open?id=0B9RfozGmRjt9cnI3Y3BvcHFNdk0 This is in the sink in the bathroom and seems particularly bad first thing in the morning but can...
  20. Scott_D

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