FIELD: machine building.
SUBSTANCE: stud comprises a body and a hard-alloy pin fixed in the body of the stud. Head of hard-alloy pin (5) intended for contact with the ground surface has a convex relief and includes in axial direction (A) of hard-alloy pin (5) partial surfaces (51) acting at different depths of the ground surface. Of the said partial surfaces (51) at least one is made as a concave so that in the convex relief there are formed at least two projections (52).
EFFECT: technical result is improved adhesion with the road surface.
14 cl, 2 dwg
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