a vertical bolt connecting the body of a vehicle with the fore axle, the body of a railroad car with a truck, etc.
(in a roof truss) an iron or steel rod serving as a king post.

Origin of kingbolt

First recorded in 1815–25; king + bolt1
Also called king rod. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for kingbolt

Historical Examples of kingbolt

  • Every object in that car, human being or salt pork, crying baby or kingbolt, was a thing to Jerry Swaim.

    The Reclaimers

    Margaret Hill McCarter

British Dictionary definitions for kingbolt


king rod


  1. the pivot bolt that connects the body of a horse-drawn carriage to the front axle and provides the steering joint
  2. a similar bolt placed between a railway carriage and the bogies
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012