Means for fixing a connecting fitting on a sintered metallic filtering element

In combination:

• a) a sintered, porous metallic tube having a cylindrical external surface, and a constant external diameter, and an internal surface which is in the form of an internal truncated cone of circular cross section at one end of the tube having a vertex half angle .alpha. greater than zero, whereby said tube has a wall thickness which increases at said one end of the tube and an internal diameter which decreases from a maximum to a minimum;
• and
• b) a connecting member comprising a truncated cone-shaped head of circular external cross section having a vertex half angle .alpha. the same as the vertex half angle .alpha. of the internal truncated cone of the porous metallic tube, and a tubular extending member attached to the head at an end of the head of smaller diameter, said head being disposed inside said porous metallic tube and cooperating with said internal truncated cone with said tubular extending member extending beyond said porous metallic tube.