Unifix

Galvanised perforated strip is a metal strip with regular holes, which can be cut and bent to fix pipes, cables and brackets. It is used for supports in building, in installations and in light metalwork. Double-perforated strip allows two ways of fixing. The plastic-coated version is designed for environments where more protection from humidity is needed. The choice depends on the weight to be supported and on the distance between the fixings.

Galvanised bolts and screws are chosen according to the finish, white, yellow or black, and according to diameter, length and strength class. Galvanising protects the metal from rust, but durability depends on the environment, on humidity and on exposure to rain. For outdoor use or in damp environments, check the directions for use of the chosen finish on the packaging.

The finish indicates the surface treatment, not the base material. White is the most common finish for general use. Yellow and black are distinguished by colour and by the treatment applied, which can change the resistance to external agents. When choosing, it is better not to rely on colour alone: read on the packaging the environment of use indicated for each finish.

White galvanised metalwork elements are parts to be assembled with bolts and screws to build supports, shelves and brackets. The pin with plate for straps is used to fix thin elements to a structure. The hexagonal coupling nut joins two threaded rods in line. Before assembly, check that the parts are compatible in thread and diameter, and that the load is suitable for the section.

The Unifix white galvanised chain is used to suspend or hold a load for general use. The capacity depends on the diameter and the type of link, and must never be exceeded. A chain must not be used for lifting unless it is marked for that type of use. Before each use, check that the links and rings are intact and free of deformation.

The white galvanised flat washer spreads the pressure of the screw or nut over the surface, preventing the piece from being damaged or sinking into the material. It must be chosen with the diameter of the bolt and with a thickness suited to the load. For wall plugs the choice changes according to the substrate, between solid wall, hollow wall or plasterboard. Before drilling, check the position of pipes and cables, and use the hole diameter indicated by the manufacturer.

Unifix galvanised screws, bolts and coupling nuts are used in the maintenance of installations, metal structures and technical supports. They must be chosen for material, thread and length, so that the piece neither sticks out nor ends up too short. On load-bearing structures or at height, the load must be assessed and the assembly instructions followed. Over-tightening can damage the thread.