Check the listing for details. 5Pcs 5/8-11 Flange Hex Nuts Grade 10.9 Black Oxide. Condition: New. Listed at 22.97 USD. Description:1. Material: A flange hex lock nut is made of carbon steel, a black oxide finish that has the function of rust prevention, corrosion resistance, high strength, durable.2. Advantages: One end of the flange nut has a wide flange, which increases the bearing surface of the nut and is not easy to loose, increasing the firmness of the connecting parts.3. Application: Hex flange nut mainly plays the role of increasing the contact surface with the workpiece, which is used in pipeline connection or the workpiece that needs to increase the contact surface of the nut. Also widely used in machinery, generators, home appliances and other projects.Specification:Product Name: Flange Hex Lock NutMaterial: Carbon SteelFinish: Black OxideGrade: 10.9Thread Size: 5/8-11Height: 22mm / 0.87"Hex Width: 26mm / 1.02"Flange Diameter: 35mm / 1.