Editing Mushroom joint

A '''mushroom joint''' is a type of [[swivel joint]].  It is based around a peg or pin with a wide ("mushroomed") top, over which another piece can be fitted.  The widened portion is what holds the swiveling piece in place.  Mushroom joints are typically found in built-in accessories, such as [[Optimus Prime (Movie)/toys|Battle Blades Optimus Prime's]] swords or the smaller guns on [[Bulkhead (Animated)|Bulkhead's]] small roof-mounted guns.  They are designed primarily to be an easy way to attach permanent parts while being detachable [[for safety reasons]].  In that regard, they serve much the same purpose as [[ball joint]]s, but in cases where the part in question should only rotate in one direction.

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[[Category:Joint types]]