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crush 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 in attempt to reduce wear and friction either by hardening their surface, or 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.
Used only twice, in very good condition, see pictures. This was part of an SBR build that I have recently reconfigured as a Commando.
$25 Cash, Paypal Friends and Family, VenMo, or CashApp.
Free ship in the Pacific Northwest by USPS First Class. In person only M-F 7am-2pm at my company in...
I did a .450 Bushmaster AR build a while ago, and just found some left over little parts. Shims are cut but otherwise unused, package of 11/16" crush washers has four left.
Free to anyone who can make use of them. I'd prefer to just mail them to someone over taking time to meet up.