**Zatik** is a mechanical engineering term referring to a **dowel pin**—a cylindrical or slightly tapering metal pin used for **temporarily joining, aligning, or securing parts**. It fits into drilled holes to ensure precise positioning and can be removed easily. Zatiki (plural) are standardized by diameter (up to \~100 mm) and length (300 mm+), often featuring slots or flanges to prevent vibration loosening and, in some designs, to act as shear-safety pins .