Bolts are inseparable in our lives. They are usually used on relatively large buildings or large machines. Although bolts may appear simple in style, their functionality is very powerful. If the machine does not have stud bolts, it may not be possible to operate. Double headed bolts are also more convenient to use than other bolts. Typical uses are irreplaceable by other bolts, such as when used for thicker connections. This double headed bolt is very important.

So what are the representation methods and standards for bolts? Below, I will provide a detailed explanation from the field of decoration. What is the manifestation of bolts? Generally, double headed bolts are represented as M12? GB/T901-88 (standard) 35 #/35 # (material) Grade 8.8/8 (modulation level) means: diameter=12mm, length=100mm. GB/T901-88 adopts the national standard. For example, M12 * 1.25 is typically used. If both ends are the same thread, M12-1.25 * L (length of one thread) - M12-1.25 * L (length of one thread) * L (total length of one thread) can be expressed as a double head screw. If there are six corners in the middle, it can be represented as a hexagonal double head screw.

The purpose and working principle of double head bolts refer to screws with larger diameters or without heads. The typical application of local anchor bolts, or places similar to anchor bolts, or when the connection is thick, ordinary bolts cannot be achieved. The specification of the bolt is marked with thread specification d=M12, nominal length L=80mm, and performance grade 4.8. The bolt of equal length is fully marked with: GB/T901M12 × The application of 80 803 double head bolts is also applicable to large equipment and accessories to be installed. For example, mechanical seal seats, reducer frames, etc. After installing the accessory, screw one end into the main body and install the nut on the other end. Due to frequent disassembly of accessories, the threads may be worn or damaged, so it is very convenient to replace them with double headed bolts. When the connecting body is very thick and the bolt length is very long, use double headed bolts. When using double headed bolts in practical work, after repeated friction, the threaded connection will become loose and lose its effectiveness. Therefore, it is necessary to do a good job in bolt maintenance during normal times. When some large equipment is operating normally, if unstable operation or abnormal noise is found, the inspection should also be stopped in a timely manner. Usually, during each maintenance period, it is necessary to carefully inspect the newly replaced stud bolts and other accessories before use to avoid larger problems. As long as you understand these specific details, you will understand that there are so many types of stud bolts. So that when I need to purchase double headed bolts in the future, I will be proficient. Because there are many sizes and specifications of these fasteners, but the differences between each model are not significant, but it is important to be familiar with these.