Coincidentally, I bought the block heater for my Kubota B7500 today, and it is the same part number. In addition to the thread sealant, my dealer recommended using silicone dielectric grease on the electrical connector. Interesting, the block drain plug hex size is the same as on a VW front wheel drive transaxle. I did a little searching and found my 3/8" drive 17mm hex bit I last used 10 years ago. Also found some Loctite PST 592 I used to install a marine hydraulic steering unit. The car and boat are long gone, but the tools still come in handy now and then. /forums/images/graemlins/smile.gif