Introducing the 5/16-18 Pronged Tee Nuts (50-pack) by POWERTEC. These pronged tee nuts can be used for an assortment of indoor and outdoor woodworking applications, and can be used for mechanical or electronic equipment, cabinet installation hardware, lighting, building bridges, furniture restoration and more! These pronged t-nuts hold your work material flush and locked in, preventing problematic rotation during assembly. Whether you're working with plywood, hard wood, plastic or particle boards - these threaded inserts provide a secure and reliable hold for all work pieces involved. 【Premium Construction: Each t-nut is made with heavy duty steel, and feature a zinc-plated coating to protect them against rust and corrosion - perfect for projects in wet environments.】【Product Dimensions: Thread size: 5/16-Inch UNC-18 , Flange Dia: 7/8-Inch, Barrel Height: 25/64-Inch, Prong Height: 17/64-Inch , Drill Size: 3/8-Inch, Package Contains: 50 pieces】.