Thread Size: TR400 X 5
Nominal Thickness - Inch: 2.047
Nominal Thickness - Millimeter: 52
Inch - Metric: Metric
Outside Diameter - Inch: 18.504

Outside Diameter - Millimeter: 470

Thread Size: 15.745-5
Threads per Inch: 5
Nominal Thickness - Inch: 2.063
Nominal Thickness - Millimeter: 52.4
Inch - Metric: Inch

Outside Diameter - Inch: 18.505
Outside Diameter - Millimeter: 470.027