Patent ID: 8684419

Claim:
A tubular connector having an axis and comprising: a pin having a nose, an external shoulder, and a conical portion between the external shoulder and the nose containing a set of external threads; a box having a bore, a rim that engages the external shoulder and a set of internal threads in the bore that engage the external threads; an internal shoulder in the bore that is engaged by an end of the nose when the rim of the box engages the external shoulder; and an annular recess formed in the bore of the box on a side of the internal shoulder opposite the nose to define an inner load bearing flange, the annular recess being sized to provide flexibility to the internal shoulder so as to allow the internal shoulder to deflect when engaged by the end of the nose; wherein the inner flange has a minimum flange thickness, and a flange width measured from a base of the inner flange to an inner diameter surface of the inner flange, the flange thickness being greater than 40% of the flange width.