CEFR B2

screw thread

noun

Meaning

A continuous helical ridge or groove on a cylinder or cone, used for engaging with a similar ridge or groove in a screw, bolt, or nut to create a fastener or transmit motion.

Examples

  • The mechanic inspected the stripped screw thread on the engine bolt.
  • A fine screw thread is needed for precision instruments.

Synonyms: thread, groove, spiral, helix