Thin parallel keys and their keyways

This standard establishes technical specifications for flat parallel keys and their corresponding keyways used in mechanical assemblies. It defines the dimensional requirements, tolerances, and geometric relationships necessary to ensure proper fit and function between keys and shaft-hub connections. The document outlines parameters such as width, height, length, and tolerances for keyways, facilitating interchangeability across different manufacturing processes. It provides guidance on surface finish and material compatibility to enhance mechanical performance and reduce wear during operation. The scope covers various sizes applicable to general engineering applications where torque transmission is required. Compliance with these specifications aids manufacturers in achieving consistent product quality and simplifies design processes for mechanical engineers. The information contained herein supports the creation of reliable mechanical joints without specifying particular materials or manufacturing methods beyond dimensional and geometric criteria.