Manifold for conveying a high-pressure fuel

In a manifold for conveying a high-pressure fuel of at approximately 1000 kg/cm.sup.2 comprising a metal main pipe having an outside diameter of approximately 20 mm and a wall thickness of approximately 6 mm, said main pipe having an axial bore and a plurality of ports formed through its wall, connected with said bore and spaced apart from one another along the length of said pipe, and a plurality of branch pipes each connected at one end thereof with one of said ports, the improvement wherein said main pipe is provided with a plurality of short cylindrical projections unitary with said main pipe and extending laterally outwardly from its wall and each having an axial bore defining one of said ports and a wall thickness approximately equal to the wall thickness of the main pipe, each of said projections having an outer end provided with a recessed surface, and an outer peripheral surface provided with a screw thread, and each of said branch pipes has a diametrically enlarged connecting head closely fitting said recessed surface of one of said projections and is provided with a nut cooperating with said screw thread for holding said head against said recessed surface.