NUT Russian patent published in 2000 - IPC

FIELD: manufacture of fastening products, possibly in building, machine engineering and other types of metallic constructions. SUBSTANCE: nut includes at least in one of its cross section boundary line of its outer and inner faces. Novelty is that a part of length of line along boundary of outer and(or) inner faces is in the form of fragment or combination of fragment of oblique cone section of straight circular cone. EFFECT: possibility of constructively provided directivity of strength properties, enhanced efficiency of fixation against self-releasing at placing between nut body and article solidified mass such as compound mass, easy identification of manufacturer. 19 cl, 13 dwg