AIA NAS4160 PDF

Purpose. This specification defines the procedures to be followed for the electrodeposited cadmium plating of fasteners, fastening systems and other related hardware primarily as a corrosion protective plating.

Classification. The plating shall be of the following types and classes as specified. 1.2.1 Types. Types refer to post plating treatments or lack thereof.

Type I – As plated

Type II – Supplemental chromate treatment

Type III – Supplemental phosphate treatment

Classes. Classes refer to the thickness of the cadmium plating (reference 3.4.1).

Class 1 – .0005 inches minimum thickness (13 micrometers)

Class 2 – .0003 inches minimum thickness (8 micrometers)

Class 3 – .0002 inches minimum thickness (5 micrometers) 

Recommendations for improvement or correction of this specification should be directed to the Aerospace Industries Association.