expansion bolt

1. 1.

   a bolt that has an attachment that expands as the bolt is driven into a surface

   Broaderbolt

Questions about expansion bolt

What does expansion bolt mean?

expansion bolt means "a bolt that has an attachment that expands as the bolt is driven into a surface".

Is expansion bolt a common word?

expansion bolt is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.