kingbolt

noun
king·​bolt | \ ˈkiŋ-ˌbōlt How to pronounce kingbolt (audio) \

Definition of kingbolt

: a vertical bolt by which the forward axle and wheels of a vehicle or the trucks of a railroad car are connected with the other parts

First Known Use of kingbolt

1839, in the meaning defined above

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The first known use of kingbolt was in 1839

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