For future reference, it is
always a good idea to lubricate the threads on devices like this to reduce galling and stripping of the threads. When this tool is cranked down, there is a considerable load on the threaded areas as the tool is by design necessity smaller than it should be for the load on it. Any decent lube will do; penetrating oil, engine oil, whatever you have. I personally favor ARP's Ultra Torque Fastener Assembly Lubricant, which we use extensively, but you could even get away using anti seize compound to both protect the treads and make torquing easier and more accurate.
