For the thread of the triangular screw used in the fastener, the three types of teeth, the diameter and the pitch are loaded with the standard thread, which is called the standard thread. The tolerance band and the thread mark of the standard thread are standardized, and the number of threads is standardized. And the direction of rotation, if not specified, it is a single-line right-handed. If the internal and external threads are to be properly screwed together to form a thread pair, the profile, diameter, direction of rotation, number of threads and pitch of the internal and external threads must be uniform. Concerned about surprises Previous: Kitchen and bathroom hardware can not be ignored but can not be ignored Next: Cabinet hardware accessories are the most difficult to distinguish between true and false purchases Steel Measuring Tape,Tape Line Measure,Magnet Tape Measure,Rubber Tape Line Measure Shangqiu Hengli Measuring Tools Co.,Ltd , https://www.henglimtools.com
The main elements of the thread of the triangular screw are the following five:
1, tooth type
On the section through the thread axis, the contour shape of the thread is called a tooth shape. The angle between the adjacent sides of the teeth is called the angle of the teeth. The common common thread has a triangular shape and a tooth angle of 60°.
2, diameter
Diameter threads have large diameters, medium diameters, and small diameters. The nominal diameter is used to indicate the thread diameter, and the nominal diameter is the diameter representing the thread size. The nominal diameter of a common thread is the large diameter.
3, the direction of rotation
When viewed in the direction of the axis, the thread that rotates clockwise becomes a right-handed thread, and the thread that rotates counterclockwise is called a left-handed thread.
4, the number of lines
The number of spirals forming the thread is called the number of lines. There are single and multi-thread threads, and the multi-thread threads are evenly distributed in a section perpendicular to the axis.
5, pitch
The distance between two adjacent teeth on the middle diameter line corresponding to two points in the axial direction is called the pitch. On the same spiral line, the distance between two adjacent teeth on the middle diameter line corresponding to the two points is called the lead. 