Spindle nut kits include All required hardware to retain hub and rotor to spindle or axle tube. 2" pin kit (wide 5 and 5X5 hubs) - 2" pin kit for all-star, howe, pcr 5X5 and most wide 5 hubs includes a retaining nut, tabbed washer and a tabbed locking ring with locking screws. Retaining nut has 1-13/16"-16 RH threads. 2. 5" pin kit (5X5 hubs) - 2. 5" pin kit for aficio, winters and scp 5X5 GN hubs includes a retaining nut, tabbed washer and a tabbed locking ring with locking screws. Retaining nut has 2-3/8"-18 RH threads. GM nut kit - kit for 1978-88 metric chassis stock type spindles includes a 3/4"-20 retaining nut, tabbed washer and a cotter pin. mustang II kit - kit for most Mustang II stock type spindles includes a 13/16"-20 retaining nut, tabbed washer, crown washer and a cotter pin.