Linear tolerances refer to the permissible limits of variation in a linear dimension, such as length or width, of a manufactured part. These tolerances ensure that parts fit together correctly and function as intended. They are typically expressed as a range, indicating the maximum and minimum acceptable measurements. In engineering and manufacturing, linear tolerances are crucial for maintaining quality and consistency. They are often specified in technical drawings and can be influenced by factors like material properties and manufacturing processes. Properly applied linear tolerances help prevent issues during assembly and ensure the reliability of the final product.