Fuel supply line system

A fuel supply line system for a fuel injection nozzle for insertion into a cylinder head of an internal combustion engine, comprising a pressure connector (20) that communicates tightly on an inlet side with a connection piece of an inlet tube and that on an outlet side is pressed axially, via a sealing face, against a seat face (12) of a threaded bore of a nozzle holder body (10) of the fuel injection nozzle by means of a screw connection, a shoulder (27) is formed on the pressure connector (20), when the pressure connector (20) is screwed into said threaded bore, in order to absorb the tightening moment, said shoulder is pressed against a contact pressure face (13) embodied complimentary to the shoulder on the nozzle holder body (10) and extending annularly around the nozzle body, and that the sealing face is disposed on a deformable body (30) that is provided between the pressure connector (20) and the nozzle holder body (10) the deformable body is a molded part (30) comprising an easily deformable material, on a side toward the seat face (12), said deformable body has a sealing face (31) and on a side toward the pressure connector (20) said deformable body is embodied conically and has a sealing edge (33), said sealing edge rests tightly against an inside of a conical recess (25) of the pressure connector (20), and is deformable in a defined way by a screwing-in of the pressure connector (20).