Attributes Overall Height 67 mm (2.638 inch) Largest OD 68.5 mm (2.697 inch) Gasket OD 62 mm (2.441 inch) Gasket Inside Diameter 54 mm (2.126 inch) Thread Pitch 1.5 mm per Thread Thread Diameter 20 mm (.787 inch) Thread Class 6H Thread Type Internal Thread Form Metric Flow Direction Outside In BPV Setting Yes Standpipe No Hydrostatic Burst Minimum 1500 kPa (217.5 psi)