9/16 X 18 1 IN SPLINE NUT

9/16 x 18 Open End Truck Acorn Spline Nut. 1.00" Length. This industrial strength open end truck acorn spline nut is precision engineered for heavy duty vehicle security and performance. Manufactured from robust Q235 steel, this fastener measures 1.0” (25.4 mm) in total length and features an open end design to accommodate variable stud lengths. The component is distinguished by a unique 7-tooth spline drive pattern that acts as a reliable theft deterrent, requiring a specific spline key for installation. A 60-degree conical seat is integrated into the base to ensure maximum contact and uniform pressure distribution against the wheel surface, with a strict concentricity tolerance of less than 0.2 mm between the tapered seat and the internal threads. The surface is finished with high-quality chroming for superior resistance against rust and corrosion in demanding road environments. For rapid identification by maintenance technicians, the nut includes permanent external markings indicating the 9/16" - 18 RH thread specification in 2.5 mm tall lettering.