Expansion screw, with a head for screwing and tightening nut, which when introduced into any extructura; wall or other material expands to prevent it from slipping and take a proper consistency.
Expansion Screw 2D DWG Block for AutoCAD
Expansion screw, with a head for screwing and tightening nut, which when introduced into any extructura; wall or other material expands to prevent it from slipping and take a proper consistency.
