A spring pin is a hollow pin component made by coiling a thin sheet of spring steel into a cylindrical shape. When pressed into a hole, it generates elastic force to prevent loosening and provide positioning.
The type with a straight joint gap is called the straight type.
Compared to solid pins, this type is lighter and is widely used for simple fastening, anti-rotation, and anti-loosening applications.
It is also known as a roll pin.
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