STUD Russian patent published in 1999 - IPC

FIELD: manufacture of fastening products. SUBSTANCE: stud includes at least in one cross section of smooth portion of rod line of section boundary. At least a part of length of line of section boundary is in the form of fragment or combination of fragments of oblique cone section of straight circular cone. EFFECT: constructionally caused directivity of strength properties, enhanced efficiency of fixation against self-turning off, easy identification of stud maker due to realizing identification properties at making stud. 14 cl, 13 dwg