What is the difference between Screws and Bolts?

Screws are collectively called fasteners or standard parts. Screws include screws, bolts, and studs. Studs refer to a class of fasteners that have no head and only have external threads on both ends, such as: double-headed studs, welding studs, etc. The difference between screws and bolts and screws is the smallest, and they are often confused. In fact, there is no particularly clear specification boundary, but the smaller ones are often called screws. Such as: Sleeper Screw, set screws, wood screws, etc. Larger screws are called bolts, such as: hexagon bolts, expansion bolts, carriage bolts, etc.
But generally speaking, bolts are used to connect two objects, usually through light holes, and need to be used in conjunction with nuts, and the single can not connect. The tool is generally a wrench. The head is mostly hexagonal, etc., and is generally larger. Screws usually do not need nuts, and directly cooperate with two objects (generally, the connecting parts need to be drilled and tapped). The tools are generally screwdrivers (screws). The heads are mostly slotted, cross recessed, and there are many internal and external hexagons. Generally smaller.
In most cases, bolts are manufactured in accordance with relevant national standards or international standards. Therefore, in the operation and circulation process, bolts will be classified as standard parts together with other parts that are also produced according to compulsory standards. Bolts, screws, and nuts (also known as nuts) are commonly known or commonly referred to as screws in many areas or non-professional accounts.
The difference between a bolt and a screw lies in two aspects. One is the shape. The stud part of the bolt is strictly required to be cylindrical and used to install a nut. However, the stud part of the screw is sometimes conical or even with a center. The aspect is the use function. The screw is not the object of the nut. In many applications, the bolt works alone and does not require the nut to cooperate with it. At this time, the bolt is classified as a screw in terms of function.
Bridge Bolt
Although Bridge Bolt is a small part, it does have a big effect. When selecting, you must choose a good quality. When using it, pay attention to the surface rust or oil stains. After handling, keep it dry. Do not contaminate it. Ensure that the operation is correct and the connection is tight.
The friction surface of the component treated before installation is not allowed to be stained with oil, dirt and other debris during installation. The friction surface of the component should be kept dry during installation and should not be operated in the rain. Strictly check and correct the deformation of the connected steel plate before installation. Hammer is prohibited Hit the bolt to prevent damage to the bolt thread.
The density and color compression strength of the Bridge bolt must be determined according to the environment. Its materials are iron, carbon steel, and stainless steel. Carbon steel is often used and can be used on railways, mainly railway systems.
We are Railway Fastening System Manufacturer, welcome to consult.

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