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A screw that is parallel to the central axis of the screw is a line connecting the peaks of adjacent screws to the summit of the screw.
The type of thread is a parallel thread, such as a metric thread (M) or a unified thread (U).
The type of thread is a parallel thread, such as a metric thread (M) or a unified thread (U).
A screw that has an angle to the central axis of the screw at an angle to the line connecting the peaks of adjacent screws is called a tapered screw.
The circumference of the external thread becomes thinner and thinner as it is screwed in, and the minor diameter of the internal thread becomes narrower and narrower as it is screwed in.
The type of thread is R, Rc, PT, etc.
The circumference of the external thread becomes thinner and thinner as it is screwed in, and the minor diameter of the internal thread becomes narrower and narrower as it is screwed in.
The type of thread is R, Rc, PT, etc.
In addition, there are two types of "pipe screws" used to connect pipes: parallel screws and tapered screws.