What is the sleeve?
When the screw is placed on an extremely hard surface, it may require a screw sleeve to protect. This case is designed to support the screw with the outer shell of the metal shell while providing a threaded surface for tightening purposes. This type of sleeve is usually used in concrete and bricks that do not support thread drilling. When the deck is mounted in a concrete building or a cinder, it must be connected to the screw sleeve. This screw is drilled to the concrete wall and provides the method for connecting the pipes of the deck.
The anchor screws are also used to install footballs. The Wests are primary structural equipment to support the deck beam to the ground. Most footsteps on board are connected to concrete with special sleeves J-Bolt. These screws ensure the on -board columns to a specific base. In concrete or stone material. A good example is the pool cover on the concrete surface. The anchored screws are used to secure the pool cover firmly on the concrete area.
ExpandThe sleeve is a special sleeve that extends when the screw is tightened. This design is similar to the mounting screw of the wall. When the screw is tightened, the outer sleeve extends to the drilled surface.
Rock climbers use special climbing screws with expansion mechanism. These climbing screws have a sleeve collapse that can be placed in small cracks inside the rocks. The screw sleeve extends to ensure that the screw is not released with a high weight. These climbing screws are designed to support a mountain climber in the event of a fall.
stone screws are special sleeves of screws that are used to secure stone structures. This screw sleeve is usually used in excavation and mining. It can be attached to the net of the net to support the structure of the rock and the falling material.
Anchor screws are available with many head patterns. These include hex, nuts and screwhead. The design of the head usually depends on the required implementation. The design of the nuts is stronger, but after tightening they have a protruding head.