1. A 'nominal size' of 5 mm or greater;

2. Note: For valves with different inlet and outlet diameters, the "nominal size" above refers to the smallest diameter. `

3. However, there is a difference between the nominal size (what the lumber is referred to) and the Actual size

4. THREAD DATA CHART: Metric Thread -- Coarse Pitch: Nominal Size ISO M: Thread Form Type: Major Diameter mm d=D: Pitch mm p: Root Radius mm r: Pitch Diameter mm d2=D2: Minor Diameter Male Thd