square nut

1. 1.

   nut with a square shape

   Broadernut

Questions about square nut

What does square nut mean?

square nut means "nut with a square shape".

Is square nut a common word?

square nut 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.