A rotary shouldered threaded connection comprising: (a) a pin element having a pin thread having a symmetrical V-thread profile, said pin thread having a pin thread stab flank , a pin thread load flank , a pin thread angle (A-11), and a pin thread root defined by a pin thread root radius (C-11); and (b) a box element having a box thread having a symmetrical V-thread profile, said box thread having a box thread stab flank , a box thread load flank , a box thread angle (A-12), and a box thread root radius (C-12); wherein the pin thread root radius (C-11) is different from the box thread root radius (C-12), and the pin thread root is tangent to the pin thread stab flank and the pin thread load flank , and wherein the box thread root is tangent to the box thread stab flank and the box thread load flank; wherein the pin thread angle (A-11) comprises a first pin thread angle (A-11) extending between the pin thread stab flank and a pin thread centerline that is disposed between the pin thread stab flank and the pin thread load flank and that extends orthogonal to a central axis of the pin element; wherein the pin thread angle (A-11) further comprises a second pin thread angle (A-11) that is equal to the first pin thread angle (A-11) and that extends between the pin thread centerline and the pin thread load flank ; wherein the box thread angle (A-12) comprises a first box thread angle (A-12) extending between the box thread stab flank and a box thread centerline that is disposed between the box thread stab flank and the box thread load flank and that extends orthogonal a central axis of the box element; and wherein the box thread angle (A-12) further comprises a second box thread angle (A-12) that is equal to the first box thread angle (A-12) and that extends between the box thread centerline and the box thread load flank . (a) a pin element having a pin thread having a symmetrical V-thread profile, said pin thread having a pin thread stab flank , a pin thread load flank , a pin thread angle (A-11), and a pin thread root defined by a pin thread root radius (C-11); and (b) a box element having a box thread having a symmetrical V-thread profile, said box thread having a box thread stab flank , a box thread load flank , a box thread angle (A-12), and a box thread root radius (C-12); wherein the pin thread root radius (C-11) is different from the box thread root radius (C-12), and the pin thread root is tangent to the pin thread stab flank and the pin thread load flank , and wherein the box thread root is tangent to the box thread stab flank and the box thread load flank; wherein the pin thread angle (A-11) comprises a first pin thread angle (A-11) extending between the pin thread stab flank and a pin thread centerline that is disposed between the pin thread stab flank and the pin thread load flank and that extends orthogonal to a central axis of the pin element; wherein the pin thread angle (A-11) further comprises a second pin thread angle (A-11) that is equal to the first pin thread angle (A-11) and that extends between the pin thread centerline and the pin thread load flank ; wherein the box thread angle (A-12) comprises a first box thread angle (A-12) extending between the box thread stab flank and a box thread centerline that is disposed between the box thread stab flank and the box thread load flank and that extends orthogonal a central axis of the box element; and wherein the box thread angle (A-12) further comprises a second box thread angle (A-12) that is equal to the first box thread angle (A-12) and that extends between the box thread centerline and the box thread load flank . <EOS>