Groove designs presented herein are applicable for use with the following MS metal O-ring 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 tube 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 Pl. 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