This SAE Standard provides a means for specifying or describing the pertinent properties of fiberboards for automotive applications. The materials normally specified by this standard are defined in SAE J 947. the test methods commonly used for fiberboards are defined in SAE J 315. The purpose of this classification system is to provide guidance to the engineer in the selection of commercially available fiberboards and further provide a method for specifying the fiberboard and its critical properties by use of a standard line call-out.