GENERAL: This standard describes the procedures to measure the thickness of a dry film of a nonmagnetic coating applied on a magnetic substrate using commercially available magnetic gages. These procedures are intended to supplement manufacturers' instructions for the manual operation of the gages and are not intended to replace them. The procedures for calibration and measurement are described for two types of gages: pull-off gages (Type 1) and constant pressure probe gages (Type 2). The standard defines a procedure to determine if the film thickness over an extended area conforms to the minimum and the maximum levels specified.