Fasteners are a type of parts used to connect and fix objects and have important application value and technical significance. Here are some facts about fasteners to help you understand their functions and related terminology. First, common types of fasteners include bolts, nuts, screws, and screws.

Bolts are usually externally threaded and have a cap-shaped head that is used to mate with a nut to connect and fasten objects. Nuts are internally threaded and rotate to mate with bolts. Screws are similar to bolts, but usually do not have a head and instead use an embedded nut or fitting to connect to the object. A screw is also a fastener that is similar to a screw but has a head that can be connected by hand rotation or a screwdriver. The thread of a fastener is one of its important features.

Common thread types include UNC (Unified National Coarse), UNF (Unified National Fine), and Metric (metric thread), etc. Thread selection should be based on the needs and standards of different applications. The strength grade of the fastener is also an important consideration. The strength grade represents the material and strength characteristics of the fastener. Common grades are 8.8, 10.9, 12.9, etc. Choosing the appropriate strength grade ensures fastener reliability under high load and stress conditions.

Fastener material selection is also very important. Common materials include carbon steel, stainless steel, alloy steel, and brass. Different materials have different properties, such as corrosion resistance, high temperature resistance, and wear resistance, and the appropriate material should be selected based on the specific application. Proper techniques and methods are also important when installing and tightening fasteners.

Proper torque and tightening torque ensures a good connection and avoids over-tightening or loosening problems. Correct fastening tools and operating methods, such as wrenches, torque wrenches, and pneumatic tools, can improve installation accuracy and reliability. Proper maintenance and repair of fasteners is also very important. Regularly check the tightening status of fasteners to prevent loosening and corrosion to ensure the reliability and safety of the connection. Fasteners are widely used in various industries and fields, including construction, machinery manufacturing, automotive industry and electronic equipment. By understanding the basics of fasteners, you can better select and use the right fasteners to ensure the strength, reliability and safety of the connection to meet your needs.