Universal Steer (FF) Axle Locking Spindle Nut 448-4836 AX 12-1500 614836 Universal Steer (FF) Axle Locking Spindle Nut 448-4836 AX 12-1500 614836 (1) Universal Locking Spindle nut for (TN)Trailer Axles. Work's on all heavy-duty applications, including RP-618, preset hubs, or the Doctor PreLoad tool. Heat Treated for superior strength. Fingertip control retaining ring for ease of placement and positioning. Easy view verification of proper retaining ring installation. Compatible with Stemco 448-4836, AX 12-1500, and Temper 614836 Get the RevHD Advantage.