FIELD: construction.
SUBSTANCE: invention relates to an assembly for producing a threaded joint. Threaded joint comprises first and second tubular components with an axis of rotation. Each of said components at one of their ends comprises at least a first threaded part formed on outer or inner peripheral surface of component according to whether threaded end is of male or female and adapted to cooperate with corresponding component by screwing. Said ends are ended with an end surface. At least one of threaded parts in longitudinal section through axis has a corresponding profile, comprising a section of continuous concave curve on at least 10 % of length of turns, engaged in said threaded part.
EFFECT: invention facilitates lubricant circulation during screwing without detriment to seal of joint and its resistance to fatigue deformation.
18 cl, 8 dwg
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