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Linchpins also referred to as lynchpins, are designed to secure a wheel or other rotating devices in its axle. They consist of a shank and an integrated self-locking ring to fasten objects in place. Aside from axle and wheel assemblies, lynchpins may also be used to replace retaining clips or R-clips in clevis pins. Linchpins are usually made from stainless steel and are available in various sizes.