







Sawtooth gecko expansion wire is a hardware accessory used for fastening connections. The following is its related introduction:
Structural characteristics
Expansion tube: usually made of plastic or metal, with a serrated structure on the tube body. This design can increase the friction with the wall or substrate, making it more firmly fixed in the installation hole after expansion.
Screw: Generally made of high-strength metal material, such as carbon steel or stainless steel. One end of the screw has threads, which are used to tighten objects with nuts, and the other end is usually conical or wedge-shaped, so that it can expand and open after inserting the expansion tube.
Nut and gasket: The threaded part of the nut and screw are matched, and the screw is tightened to pull the expansion tube and expand. The gasket is used to increase the contact area between the nut and the fastened object, disperse pressure, and prevent damage to the surface of the fastened object.
Working principle
When installing, first drill suitable installation holes on the wall or substrate, insert the expansion tube of the expansion wire into the hole, and then insert the screw into the expansion tube. When tightening the nut, the screw gradually moves into the expansion tube, and its conical or wedge-shaped end causes the expansion tube to expand outward. The sawtooth of the tube body is embedded in the wall or substrate, thereby generating strong friction and anchoring force, firmly fixing the object on the substrate.
Specification and model
The diameter usually comes in various specifications such as 6mm, 8mm, 10mm, 12mm, etc., while the length ranges from 30mm to 150mm to meet different installation needs. For example, for fixing lightweight objects such as curtain rods, expansion wires with a diameter of 6mm and a length of 30mm-50mm can be selected; For some heavier objects such as air conditioning brackets, expansion wires with a diameter of 10mm or 12mm and a length of 80mm or more may be required.
Application scenarios
Widely used in the field of building decoration, such as installing doors and windows, furniture, bathroom equipment, lighting fixtures, etc. In home decoration, it can be used to fix hanging cabinets, bookshelves, etc. on the wall; In engineering construction, it is also commonly used to fix pipeline supports, cable trays, etc.
advantage
Easy to install, no special tools required, only a screwdriver or wrench is needed to complete the installation.
• Has high load-bearing capacity and can meet the fixed requirements of objects of different weights.
Widely applicable and can be used on substrates of various materials, such as brick walls, concrete walls, hollow walls, etc.