Abstract: A method and means for gauging of threads, by use of a gauge roller, for the purpose of detecting possible defects in the thread profile. The gauge roller, having different areas which have the correct profile of parts of the thread groove and depressions between said areas, is mounted on at least one lever for permitting approximately radial movement of the gauge roller. A reference for indicating and/or measuring said movement is established by mounting a reference element in the vicinity of the gauge roller, and movements of the gauge roller caused by defects in the thread are indicated and/or measured relatively to the reference. The reference may be established by use of a roller having the correct profile of the thread, whereby the relative radial and/or axial movement between the gauge roller and the reference roller is indicated and/or measured.