Swivel joint

A swivel joint, variously called a hinge, pin joint, or simply a "swivel", is a joint which couples two components together while allowing them rotary motion relative to each other. On Transformers toys, a swivel must sometimes be restricted from moving freely, which can be done by friction, spring-loaded tabs in slots, or ratchets.

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See also

• Ratchet (mechanism)
• Slide joint
• Ball joint