Groove designs presented herein are applicable for use with the following MS metal o-rings gaskets, or to dimensionally equivalent gaskets of other materials: a. AMS 5570 or AMS 5576 Plain; 1. MS9141 - 0.035 tube x 0.006 wall; 2. MS9142 - 0.062 tub x 0.006 wall; 3. MS9202 - 0.062 tube x 0.010 wall; 4. MS9203 - 0/094 tube x 0.006 wall; 5. MS9204 - 0.094 tube x 0.010 wall; 6. MS9205 - 0.125 tube x 0.010 wall. B. AMS 5570 or AMS 5576 Silver PI; 1. MS9371 - 0.035 tube x 0.006 wall; 2. MS9372 - 0.062 tube x 0.006 wall; 3. MS9373 - 0.062 tube x 0.010 wall; 4. MS9374 - 0.094 tube x 0.006 wall; 5. MS9375 - 0.094 tube x 0.010 wall; 6. MS9376 - 0.125 tube x 0.010 wall.