First, the characteristics of bolts
A bolt is a typical external threaded part and is usually labeled “B”. It has a hexagonal head that can be tightened with a wrench or wrench, or with a pneumatic or hydraulic tool. The bolt is generally composed of two parts, respectively, screw and nut. One end of the screw of the bolt has a cylinder in the workpiece hole, and the other end is an external thread. There is a thread on the screw, also known as the screw lever, which is used to work with the nut. Bolts are generally used in applications requiring high strength and high reliability, such as aerospace, railway, heavy machinery and other fields.
Second, the characteristics of screws
A screw is an internally threaded part, usually labeled “M.” The biggest difference between the screw and the bolt is that the screw does not have an independent nut, and its external thread is directly fixed in the workpiece, so its installation method is different from the bolt. Screws are generally divided into mechanical screws and self-tapping screws. The outer diameter of mechanical screws is less than M1.6, which is usually used for micro equipment, and the outer diameter of self-tapping screws is between M1.6-M10, which is widely used in electronics, machinery, electrical appliances, automobiles, electricians, construction and furniture.
Third, the characteristics of the nut
A nut is a fastener used to fit a bolt or screw, usually labeled “N”. It is hollow inside and can be matched to the thread of a bolt or screw. Nuts are generally used to increase and adjust the fastening force of bolts or screws, there are many types of hexagonal nuts, cylindrical nuts, lock nuts and so on. The variety of nuts, complete specifications, for different occasions and requirements to provide a variety of choices.
【 Conclusion 】
In general, although bolts, screws and nuts are fasteners, their uses and installation methods are different. It is very important to understand the difference between them, which can be better applied to different fields and occasions to improve work efficiency and work quality.