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washers

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. W

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  2. D

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  3. M

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  4. S

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  5. J

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    • John The Rad
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    • Forum: Plumbing Jobs | The Job-board
  6. R

    career change time

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  7. moonlight

    Where can I buy click waste washers?

    Hope someone can help. I have been looking around for a new washer for a click waste but have not been very successful. Does anyone know where I can buy them? Thanks
  8. A

    changing a toilet syphon

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  9. G

    Quantity of cistern conical rubber washers?

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  10. W

    Anyone knowwhat size / where to purchase these rubber washers

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  11. S

    Grundfos 200 series pump washers

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  12. A

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  13. T

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  14. R

    Water hammer causing humming in main cold feed pipe....Please help

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  15. P

    Source-Drain cock replacement washers..?

    Does anyone do packs of these...? Sick of changing drain cocks..!
  16. J

    Tap washer

    Very simple thing but keeps catching me out. I went to a job today and the washer had gone, leaving a dripping tap. simples! But when going to put the washer in, it didnt fit. These are the head gear which has a sort of cup for the washer to go in and a screw to tighten up. I managed to get...
  17. G

    Fibre washers

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  18. 2

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  19. G

    Do i grass????

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  20. N

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