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A washer with a "wave" in the axial direction, which provides spring pressure when compressed. Wave washers, of comparable size, do not produce as much force as Belleville washers. In Germany, they are sometimes used as lock washers but they are less effective than other choices. [a] [8] Split washer or spring lock washer
Drawing of lock washer involved in National Lockwasher v.Garrett – from patent. National Lockwasher owned U.S. Patent 1,655,018, which covered split-ring, compression-spring lock washers with a construction preventing them from interlinking with one another when handled in bulk.
One point: The statement "A split washer or a spring lock washer is a ring split at one point and bent into a helical shape. This causes the washer to exert a spring force between the fastener's head and the substrate." is false. Once compressed, a split washer DOES behave like a flat washer.
Standard nut employed as a jam nut against another standard nut. A jam nut is a low profile type of nut, typically half as tall as a standard nut.It is commonly used as a type of locknut, where it is "jammed" up against a standard nut to lock the two in place.
A split pin (UK usage) / cotter pin (UK/USA usage) holding a rod in place with a washer. A split pin, also known as a cotter pin, or cotter key in the US, [1] is a metal fastener with two tines that are bent during installation, similar to a staple or rivet.
A positive locking device is a device used in conjunction with a fastener in order to positively lock the fastener. This means that the fastener cannot work loose from vibrations. The following is a list of positive locking devices: [1] A split beam nut; A castellated nut and a split pin; A hex nut or cap screw and a tab washer
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