Fastener nuts are internally threaded devices that are typically used in combination with equally threaded bolts to produce a joining of two or more components. Standard inch and metric fastener nuts are available in a wide range of sizes, strengths, materials and finishes and aid in securing a joint from loosening due to vibration. Fastener Solutions offers a variety of nuts that are available in a selection of shapes, sizes, styles, grades, and plating. http://www.eeqformwork.com/formwork-accessories/fastener-nut/