Abstract: A pipe connector comprising tubular pin member having an outer peripheral surface and a tubular box member having an inner peripheral surface corresponding to the outer peripheral surface of the pin member and which overlies the outer surface of the pin member when the members are fully engaged together, the members being provided with inter engaging projections and grooves on said peripheral surfaces for axially locking the members together when they are fully engaged together, the pin member further comprising an annular collar shrink fitted onto the pin member above of the peripheral outer surface, the collar comprising a shoulder at one end of the collar adjacent the outer peripheral surface of the pin member, the arrangement being such that when the members are fully engaged together, the tubular box member abuts the shoulder of the annular collar.