expansion bolt
noun Building Trades.
a bolt inserted into a hole drilled in masonry and mechanically expanded to serve as an anchor for shelves, timbers, etc.
Words nearby expansion bolt
expansile,
expansion,
expansion attic,
expansion bend,
expansion board,
expansion bolt,
expansion card,
expansion chamber,
expansion joint,
expansion slot,
expansion team
British Dictionary definitions for expansion bolt
expansion bolt
noun
a bolt that expands on tightening, enabling it to be secured into an unthreaded hole