The 14 bolt (and original Eaton) uses a 2"-16 thread spindle nut.
like the old Eaton axle they usually have a flat washer and two nuts with a tab locking washer in between. This works OK, but can be aggravating to adjust and lock and unlock the tabs, the washer is also not forever reusable, the tabs will eventually break.
A very nice upgrade as comes on some later model 14 bolts and or AAM axles is a single nut with a key and spring clip to retain it.
I found the OE parts very reasonably priced from
www.cmgearworks.comAAM part numbers:Nut 341509
Key 40082234
Clip 341511
Alternate Dorman part numbers, available at many auto parts stores (possibly more expensive than the OE parts)
Nut 615-132
Key 615-140
Clip 615-141
Just for info:
Dorman part numbers for the old fashion washer, nut, lock tab, and nut solution.
Flat washer 618-048
Spindle nut 615-130 (need two per side) also known as Dana # 33732
Spindle lock washer 618-049
Other axles that use same spindle thread and may benefit, Our original Eaton HO52 and HO72, many Dana 70 rear axles, and Dana 50 and 60 front axles.
