A washer is a thin plate (typically disk-shaped) with a hole (typically in the middle) that is normally used to distribute the load of a threaded fastener, such as a screw 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 usually have an outer diameter (OD) about twice the width of their inner diameter (ID).
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.
Rubber or fiber gaskets used in taps (or faucets, or valves) to stop the flow of water 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.
Washers are also important for preventing galvanic corrosion, particularly by insulating steel screws from aluminium surfaces.
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.
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Various kinds of fasteners for you reference
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1 :We can provide samples in 7 days
2 :Provide custom made service
3 :We can help you develop new product
4 :Quality assurance
5 :Factory price
M-sing Screw Factory with a mature production technology and sophisticated processing techniques, improved detection methods, with the development of strong design capabilities, product quality, the introduction of domestic and international high-precision molds and high-quality raw materials. The main production line with GB, Japan’s JIS, the United States ANSI, the German DIN, BS British standards of bolts, and customers can request all kinds of difficult design and production of standard parts. And through third-party authoritative testing agencies product testing, qualified in the relevant report. Re-header equipment, Roll Machine, tail-cutting, stamping machines, slot milling machines, line cutting, automatic lathes, and other production equipment, some of which more machinery assembling a computer-controlled, automatic detection display, can provide the steady and rapid Zero tolerance of the product, the monthly production capacity of several 10 million.
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1 : We accept all kinds of payment
2 : Provide a tiny order if the products needed in our warehouse
3 : We will reply your email as much as 15 hours