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.