lag screw

• مسمار لولبي كبير ومتين ذو رأس سداسي، يُثبَّت في الخشب أو البناء بالحجر بواسطة مفتاح ربط أو مفتاح صندوقي، ويُستخدم عادةً في تثبيت الهياكل والإنشاءات.

A large, heavy-duty screw with a hexagonal head, designed to be driven into wood or masonry using a wrench or socket, typically used for structural fastening.

1. Large threaded fastenerC1formal

   A heavy-duty screw with a hexagonal head and coarse threads, designed to be used with a nut or driven into wood or masonry for strong connections.

   مسمار لولبي كبير

   • The carpenter used a lag screw to secure the heavy beam to the wall.
   • Make sure to pre-drill a pilot hole before inserting the lag screw.
   • Lag screws are essential for building sturdy wooden decks.