Thread Size: M55 X 2
Nominal Thickness - Inch: 0.63
Nominal Thickness - Millimeter: 16
Inch - Metric: Metric
Outside Diameter - Inch: 2.969

Other Features: Hardened Steel | Mechanical Lock | One Piece Solid | Three 10-24 Set Screws
Outside Diameter - Millimeter: 75.4

Thread Size: M55 X 2
Nominal Thickness - Inch: 0.5
Nominal Thickness - Millimeter: 12.7
Inch - Metric: Metric
Outside Diameter - Inch: 2.969

Other Features: Mild Steel | Mechanical Lock | Three 1/4-28 Set Screws
Outside Diameter - Millimeter: 75.4