- a bar of iron bent into the shape of a U, fitted with a screw thread and nut at each end.
Origin of U bolt
First recorded in 1880–85
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- a metal bar bent into the shape of a U and threaded at both ends to receive securing nuts: used to secure leaf springs, ring bolts, shackles, etc