Patent ID: 7938663

Claim:
Coaxial plug-connector part comprising: a cap nut disposed rotatably and in an axial force-fit manner on an outer-conductor, which can be screw-connected in order to generate the contact pressure between outer-conductor butting contact surfaces of the plug connector part with an external thread of a counter plug-connector part, wherein the frictional torque of the axial force-fit between the cap nut and the outer-conductor is selected to be smaller than the frictional torque between the outer-conductor butting contact surfaces of the plug connector, and wherein the axial force-fit between the cap nut and the outer-conductor is provided via a retaining ring, and the coefficient of friction between the cap nut and the outer-conductor μ s is selected, such that a diameter ratio of the retaining ring d s and outer-conductor butting contact phases d o , is smaller than a coefficient of adhesion μ′ 0 of the butting contact surfaces, and hold the relation: μ s < μ o ′ ⁢ ⅆ o ⅆ s .