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Glite Dictionary
machine bolt

machine bolt

4.1
A metal rod with a square or six-sided head and threads that you turn with a wrench
  • noun
  • /məˈʃin boʊlt/
  • Specialized
translation icon : tornillo de máquina
  • She replaced the rusted machine bolt connecting the steel beams.

Examples

  • The mechanic secured the engine block using a machine bolt and a socket wrench.

  • Each machine bolt in the assembly must be tightened to the manufacturer's specified torque.

  • I need a machine bolt for this project.

  • The machine bolts are in the toolbox.

  • The mechanic used a machine bolt to secure the metal plate to the chassis of the car.

  • To assemble the frame, she tightened each machine bolt with a wrench until they were secure.

  • He replaced the rusted machine bolts on the equipment to ensure it operated safely.

Synonyms

bolt
vsmachine bolt
  • Specialized
42 3.8

A metal pin with a head that holds two parts together with a nut

is a specific version with square or hex heads tightened by a wrench

Surface Forms

machine bolt singular
machine bolts plural

Morphology

machine + bolt

The compound 'machine bolt' is compositionally built from 'machine' (a device) + 'bolt' (a fastener), so a B1 learner who knows both constituents will infer it refers to a type of bolt used with machines or in machine assembly. The specific technical details (square/hex head, wrench tightening) are specialist, but they do not block the overall transparent, compositional interpretation.

Etymology

Machine bolt is a compound name for a strong bolt made for a machine. Imagine a metal pin with a square or hex head and a spiral 'thread' that you turn with a wrench to 'fasten' two metal parts together, and that literal picture explains why the term means a bolt used to hold machine parts in place.