BS A 401-420 specifies the dimensions, materials, protective finishes, and part numbers for 100° countersunk head and pan head screws with unified threads for non-structural general aerospace use.
BS A 401-420 on Aerospace series is useful for:
Manufacturing firms that are involved with aircraft flight within and outside the atmosphere.
BS A 401-420 covers all the quality control requirements for screws, pan, and countersunk head. It creates a standardized approach for manufacturers of screws that they need to adhere to if they supply their products for use by the aerospace industry.
Quality Assurance measurements in BS A 401-420 ensure that the approaches, techniques, methods, and processes designed for the aircraft assembly are implemented correctly.
By adopting BS A 401-420, manufacturers can demonstrate the reliability of their assembly parts and build trust in their use throughout the aerospace supply chain.