12MM X 1.25 0.87IN SPLINE NUT

12 mm x 1.25 Open End Passenger Spline Acorn Nut. 0.87" Length. This high performance open end passenger spline acorn nut is specifically engineered for reliable wheel security and versatile fitment applications. Manufactured from durable Q235 steel, each fastener features a low profile total length of 0.87” (22 mm) and an open end design that allows for full compatibility with extended wheel studs. The component utilizes a precision 6-tooth spline drive pattern to serve as an effective theft deterrent, requiring a specific security key for installation and removal. A precision machined 60-degree conical seat is integrated into the base to ensure uniform pressure distribution against the wheel surface, maintaining a strict coaxial tolerance of less than 0.2 mm between the tapered seat and the internal threads. The exterior is finished with a premium chroming surface treatment to provide exceptional resistance against environmental rust and chemical corrosion. For rapid maintenance identification, the nut includes permanent external markings indicating the M12 - 1.25 thread specification in 2.5 mm tall lettering.