FIELD: woodworking industry, in particular, fastening pieces of wood members. SUBSTANCE: fastening piece has the shape of rod 1 with head 2. Rod 1 is furnished with alternating coaxial gear modules 3. Each module 3 in the longitudinal section has the shape of a trapezoid and forms bulges 4 and spaces 5 on the rod. Each module is made in the form of a truncated cone. The larger planes of modules 3 are directed towards head 2. All transitions between the bulges and spaces are chamfered. EFFECT: enhanced reliability. 3 cl, 2 dwg
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