Kitchen Sink Strainer Nut Falling Off
Don't have THE answer for you: but have questions: I have never seen a "white metal nut" on a basket strainer set. Now, is this nut "white" when new, and before you install it? OR-does it turn this "whitish" color after being on for the almost a year? IF it's turning the whitish color after being installed for some months this tends to lead me to believe you have a "galvanic" corrosion problem, caused by the interference fit of two dissimilar metals with some type of very small electrical current traveling between them. Probably too late to check this, but I'm wondering if you could actually see a difference in the threads of the nut before installing it and then after having it on for some months. If the threads appear to have been eaten away, then it is definitely galvanic corrosion. I would try to apply some Teflon based pipe dope to the threads of a new, clean, basket strainer before applying a new, clean, nut--even wiping some pipe dope on the internal threads of the nut. This may/should help with this problem.