The invention relates to a connection of two coaxially in-line elements in a fuel supply system of an internal combustion engine, in which the first element is preferably a receiving bush of a fuel distributor line (1) with a guide opening, and the second element, embodied as a pressure regulating valve (8) or pressure chamber, is insertable by a guide portion (19) into the guide opening (18) of the receiving bush (3), which facing one another in a wall (30) has two retention openings (31), aligned both with one another and with a retention groove (37) in the pressure regulating valve (8), which openings a U-shaped retention clamp (32) projects through with its legs (34) and in so doing fixes the position of the first element (3) and second element (8) relative to one another, which elements, at least in the region of the retention clamp (32) have portions of stainless steel. Alternatively, the first element may be an injection valve, which is inserted by one end into a plug connection (2), forming the second element, of the fuel distributor line (1), where it is fixed by means of a securing clamp, and the injection valve and the plug connection (2), at least in the region of the securing clamp, have portions of stainless steel. The invention provides that the retention clamp (32) is formed by a spring wire and the securing clamp is formed of a spring band of stainless steel, in order to prevent contact corrosion.