Crafted from hardened carbon steel with a zinc-plated finish, these heavy-duty studs are engineered for exceptional performance in thin sheets. Featuring a 5/16-18 thread size, they boast an enlarged head diameter that effectively reduces stress on panels. The thicker head design allows for larger holes in attached panels, while the clinch mechanism ensures high-strength fastening in sheets as thin as .031 inches. Ideal for use in steel or aluminum sheets with a hardness rating of HRB 85 or less and HB 165 or less, these studs offer reliable durability and functionality for a variety of applications. Upgrade your fastening solutions with these premium studs, designed for maximum performance in demanding environments.