FIELD: metal working. SUBSTANCE: stop is made of sheet steel and is a parallelepiped. The tops of ribs 3 of side 4 of the parallelepiped are rounded and used for interaction with the inner cylindric surface of the part. Prism hollows having 108 deg central angle are made in opposite sides 2 for interaction with the outer cylindrical or conical surfaces of the part. Chamferings inclined at 45 deg, prism hollows arranged symmetrically with respect to the vertical axis of symmetry, and parts for interaction with the conical opening are provided at lower parts of roundness 3. EFFECT: enhanced reliability. 2 cl, 10 dwg
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