Review on Finish Knurled Partially Threaded Threads by Rodney Gonzalez

I should have written earlier. "Black oxide coating for excellent corrosion resistance" is the absolute statement of the Bologna sandwich. I bought this in May 2017 and used it to hold the lid of a watering box. The screw rusts after a month. Probably needs to be replaced. Oct 14, 2018 I decided to take it off but it's rusted through.