Lag screws, commonly referred to as Hex lag screws or Hex Lag Bolts, referred to also as “hex lags”, are threaded bolts/screws with a sharp point with a hex head and are most commonly referred to as Hex lag screws or Hex Lag Bolts, referred to also as “hex lags”, zinc plated, ZP, are threaded bolts/screws with a sharp point with a hex head and are most commonly used in wood applications.