A Dowel Pin is a cylindrical, straight pin used to align or join two parts together. Typically made from materials such as steel, stainless steel, or plastic, dowel pins are designed to fit into drilled holes in the parts being connected. They provide precise alignment, ensuring that the parts maintain their position relative to each other, even under stress or movement. Dowel pins are used in a wide range of applications, from woodworking to machinery and automotive assembly. ... Dowel pins come in different types, including plain dowel pins, grooved dowel pins (which have grooves to prevent rotation), and tapered dowel pins (which are used for a tight, secure fit). They are commonly used in applications like alignment, assembly fixtures, and structural joints.