A nut round in shape, whose outer surface or portion(s) is/are knurled. It may have provisions for external wrenching. An integral feature is incorporated for locking on the threads of a mating member.
NSN 5920-01-629-6934
NSN 5835-01-090-0784
NSN 6105-00-121-1874
NSN 6620-00-980-3157
NSN 5960-01-144-9183
NSN 5835-00-364-0816
NSN 5915-01-142-7832
NSN 6610-01-457-1974
NSN 5935-00-101-7818
NSN 5895-00-637-2658
NSN 5935-01-646-0764
NSN 5935-00-234-5773