This hex nut features ISO metric threading and is manufactured to ISO 4032 standards in property class 10 steel. It's designed to pair with bolts and screws of property class 10.9 or lower. The hot-dip galvanized finish makes it a top choice for structural steel applications and outdoor environments where long-lasting corrosion protection and low maintenance are essential. The threads are cut to a 6H tolerance class and should be paired with externally threaded components—such as bolts and threaded rods—rated at 6az tolerance before galvanizing. Since the threads are tapped after galvanizing, they aren't coated themselves; corrosion protection comes from the zinc layer on the mating fastener.