[Jeff, Daniel]
We added a 10" to 4.5" CF Zero Length Reducer Flange to what will be the south side of the Laser Filter Cavity (LFC) Input Vacuum Cube. We did a bit of cleaning of the cube face before placing the flange and gasket. We moved a 10" to 2.75" CF Zero Length Reducer Flange from the LFC Cube to the input side of the Demonstrator Interferometer (IFO), also after some cleaning of the cube face. We initially hand tightened the screws when the flange wasn't properly seated, but we loosened the screws to properly place the flange. I tightened the top and side of the LFC Vacuum Cube to 13.6 Nm twice and the IFO Vacuum Cube to 13.6 Nm once. I will finish tightening these 3 flanges later.
I tightened these flanges. The top flange of the LFC input vacuum cube, which used holes that Ian and I tapped, only required 27 Nm and fewer turns than usual. I think this is because I am lightly tapping the threads in other cases. The other two flanges required 34 Nm. Like in other cases, these two flanges are not flush around the entire cube.