This standard provides the following: a. definition of terms pertaining to marking; b. symbols for marking location; c requirements and restrictions for permanent markings; d. types of marking methods; e. rules for designating marking methods; and f. table listing marking methods.

To define and control marking methods, and to provide a method for specifying desired marking methods on aerospace engineering drawings of parts and assemblies.

Standard revised to replace cancelled military specification TT-L-50.