Basic knowledge of double head bolt specifications

2023-06-21 15:54:36

Generally speaking, the specifications of double head bolts are determined by factors such as thread diameter, pitch, length, and cover length. Here are some basic concepts and knowledge:

Thread diameter: also known as nominal diameter, is the diameter of the outer and inner rings of the thread. The general unit is millimeters (mm).

Pitch: The distance between threads, for coarse threads, the pitch is equal to the height of the thread; For fine threads, the pitch is less than the height of the thread.

Length: The length of a double headed bolt generally includes the length of two screws and the middle screw, which is also measured in millimeters. (mm).

Thread coverage length: Thread coverage length refers to the length of the threaded part covered by the bolt.

When selecting double headed bolts, it is necessary to choose the appropriate specifications based on the size and purpose of the connecting parts. For example, if the aperture of the connecting piece is large, it may be necessary to choose a double head bolt with a larger diameter; If you need to withstand a large tensile force, you may need to choose a double head bolt with a smaller pitch and higher strength.