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Linchpin |
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linchpin, lynchpin
a pin placed transversely through an axle to keep a wheel in position Linchpin a wedge-shaped rod that fits into a hole in a part and prevents another part from shifting to one side while fastened to the first part. The shape of a linchpin prevents the pin from falling out of the hole. Linchpins were used in horse-drawn vehicles to prevent the wheels from coming off the axle. They are used for unstrained joints between parts, for example, as safety pins in hand grenades. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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