What is the gap from coil to head?

The gap from coil to head typically refers to the space between the coils of a coil spring and the head of a component, such as a bolt or a cap. This gap can be important for ensuring proper function, allowing for movement or compression without obstruction. In engineering and design, maintaining an appropriate gap helps prevent wear, ensures efficient operation, and accommodates thermal expansion. Specific measurements and tolerances depend on the application and type of spring used.