BigPatents India

The invention relates to an improved square flange for hydraulic system in which both flange halves are threaded and are identical, comprising a pair of flanges provided with a counter—bored diame ter on the mating faces and the screws are provided with thread relief near the head end on the screw shank, a sealing 0—ring with a back—up ring is provided centrally between the flange bodies. (FIG. - 1)