Patent ID: 6843508

Claim:
A hydraulic valve having a nut part ( 10 ) with a threaded hole ( 19 ) which has an internal screw thread ( 30 ) with a defined nominal diameter and with a defined, uniform pitch, and having a screw part ( 20 ) which has an external screw thread ( 35 ) with the same nominal diameter as the threaded hole ( 19 ) and with a defined, uniform pitch, which is screwed into the threaded hole ( 19 ) wherein there is a light difference between the pitch of the internal screw thread ( 30 ) of the nut part ( 10 ) and the pitch of the external screw thread ( 35 ) of the screw part ( 20 ), further wherein the screw part ( 20 ) defines a fluid flow passage there through wherein the screw part ( 20 ) has a shank ( 31 ) which bears the external head ( 32 ) and a head ( 32 ), in which the diameter of the screw part ( 20 ) is greater than in the shank ( 31 ), and wherein the bead ( 32 ) starting from the shank ( 31 ), increases in diameter over a defined axial length.