You can edit these properties on the part properties dialog box.
IJOAhsPipeOD::PipeOD
Specifies the actual outside diameter of the pipe (or insulation). This value is passed in by the Assembly Information Rule (AIR) and by default it is set to some reasonable value. This value is used to position the U-Bolt vertically along with UBoltTopGap and is used with Gap1 to locate the blocks and the nuts.
IJOAhsPipeToSteel::PipeToSteel
Specifies the clearance between the outside of the pipe and the steel. This value is passed in by the AIR and by default it is set to some reasonable value.
IJOAhsSteelThickness::SteelThickness
Specifies the thickness of the steel to which the U-Bolt is attached. This value is passed in by the AIR and by default it is set to some reasonable value.
IJOAhsRoty::RotY
Rotates the U-Bolt along the Y-axis of the route port. Use this property to align the U-Bolt with sloped pipes or sloped steel.