Post by nafizcristiano2 on Feb 15, 2024 11:29:59 GMT
We all know that small piece called a screw that has a cylindrical or conical shape and is equipped with a helical thread and head to be screwed. Despite its small size, it is of great importance when fixing or joining elements temporarily or permanently. But it is important to know what type of screw to choose for each job. In this guide, we solve all your doubts. What material is a screw made of? Screws are usually made of steel, black steel, stainless steel, brass and, for certain jobs, plastic. The most used are those made of steel. Stainless steel ones are used for humid or underwater environments. Brass ones are usually used for interior wood work due to their decorative effect. The plastic ones are indicated for certain plumbing jobs. Among the most common finishes is galvanizing , which consists of applying a layer of zinc to the screw for antioxidant purposes; brass plating , for decorative purposes due to its shiny metallic appearance; the bluing , which gives them an intense black color. Parts of a screw All screws basically.
consist of two parts: the head and the shank. The head is the top. It can have different shapes: flat, countersunk, round, hexagonalhape determines the tool that must be used to tighten. For those that have a slot, a screwdriver is used and for those that do not have one, open-end wrenches. The shank is the body or Guinea Email List elongated part of the screw which, in turn, is divided into the shaft or neck (the smooth part) and the final section (the threaded part). Some screws do not have a shank and have the entire surface of the shank threaded. Types of screw heads Hex head Hexagonal head screw They are used when it is not necessary to apply great tightening . To screw them in you need to use flat head screwdrivers. star head Star head screw Those with a cruciform slot head, commonly called star or Phillips, allow automatic centering of the .
corresponding screwdriver , facilitating its placement. They are used when a medium torque force must be applied . There is an improved variety, the Pozidriv, which incorporates four additional guides at 45 degrees. They are widely used in electronics . Allen screw Allen screw Those with a head with an internal hexagon (also called Allen) are used in joints that require large tightening and that are narrow , generally, in pieces with a smooth and metallic surface. They are tightened using Allen keys and are mainly used in furniture assembly. Cylindrical and butterfly head Wing screw in a joint Source: They are used in joints that do not require great tightening and frequent manual assembly and disassembly processes occur . Self-tapping screws Self-tapping wood screw Source: op2fc Within this category, there are two uses: those used to join thin metal sheets and those used to join pieces of wood . In both cases, the female thread is made by the screw itself as it penetrates the material.
consist of two parts: the head and the shank. The head is the top. It can have different shapes: flat, countersunk, round, hexagonalhape determines the tool that must be used to tighten. For those that have a slot, a screwdriver is used and for those that do not have one, open-end wrenches. The shank is the body or Guinea Email List elongated part of the screw which, in turn, is divided into the shaft or neck (the smooth part) and the final section (the threaded part). Some screws do not have a shank and have the entire surface of the shank threaded. Types of screw heads Hex head Hexagonal head screw They are used when it is not necessary to apply great tightening . To screw them in you need to use flat head screwdrivers. star head Star head screw Those with a cruciform slot head, commonly called star or Phillips, allow automatic centering of the .
corresponding screwdriver , facilitating its placement. They are used when a medium torque force must be applied . There is an improved variety, the Pozidriv, which incorporates four additional guides at 45 degrees. They are widely used in electronics . Allen screw Allen screw Those with a head with an internal hexagon (also called Allen) are used in joints that require large tightening and that are narrow , generally, in pieces with a smooth and metallic surface. They are tightened using Allen keys and are mainly used in furniture assembly. Cylindrical and butterfly head Wing screw in a joint Source: They are used in joints that do not require great tightening and frequent manual assembly and disassembly processes occur . Self-tapping screws Self-tapping wood screw Source: op2fc Within this category, there are two uses: those used to join thin metal sheets and those used to join pieces of wood . In both cases, the female thread is made by the screw itself as it penetrates the material.