This hex nut is standardized to ISO 4032 and manufactured from grade 8 steel. It's designed to pair with bolts and screws of property class 8.8 or lower and features a metric thread. The finish is a Cr(VI)-free zinc flake coating per ISO 10683 (flZnnc 8)—a zinc-aluminum blend that delivers superior corrosion protection compared to a pure zinc layer of the same thickness. Best of all, this coating eliminates any risk of hydrogen embrittlement.