see also https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=28644

Today I further torqued the RGA analyzer to protective nipple flange that was "gappy" from the factory.  The factory supplied fasteners are an inadequate alloy and limit the factory assembler's ability to achieve the desired "flange-to-flange" joint (it is 2016, why can't they just use silver plated A-286 like the rest of the free world?).  Anyway, I was able to improve the situation and further close this joint using metric wrenches (arghh! again with the "it is 2016...free world") and elbow grease but couldn't go as far as I would have liked.  I again leak tested this joint (7 x 10-9 torr*L/sec baseline) and, again, found it not to be leaking but the real proof will be after it goes through the upcoming bake cycle.  Additionally, I opened the Nitrogen and Krypton isolation valves so as to allow leak testing of their double sided 1.33" CF joints.  No leaks (6 x 10-9 torr*L/sec baseline) here either.  Next up will be to bake everything (will likely start Wednesday, Aug. 3rd during HAM6 vent activities).  

Leaving area with Nitrogen and Krypton isolation valves closed, local turbo off and isolated and leak detector off and decoupled.