I upgraded my trailer brakes to disc but have lost/misplaced one 7/8"-20castle nut. I know the standard 7/8" nut has 14 threads per inch. I've called trailer shops, auto parts house, industrial part shops, fastener specialty shops, axle repair shops, and a host of other shops with no sucess
. I mic'd the diameter and used a thread gage to establish it's a 7/8"-20 spindle/nut. I can't believe that no one carries this nut. Anyone know where I can buy one? Sorry for the poor pic quality but was foggy this morning when I took it.