Most of our fasteners have a light zinc plating over steel giving a more rust resistant finsh. Not all fasteners are applicable for all applications so be certain to test thouroughly and get the opinion of a licensed building or certified building or structural engineer before ...MoreMost of our fasteners have a light zinc plating over steel giving a more rust resistant finsh. Not all fasteners are applicable for all applications so be certain to test thouroughly and get the opinion of a licensed building or certified building or structural engineer before relying on these fasteners for any situations where failure would result in damage to property or person.Lessview less