No other part numbers with same form, fit, and function found.
A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5990-01-534-8609
NSN 6620-00-516-3204
NSN 5965-01-567-2975
NSN 5895-00-472-9829
NSN 6135-01-389-8289
NSN 4140-01-248-0157
NSN 5930-01-446-8264
NSN 5999-01-584-9418
NSN 6320-01-116-3980
NSN 5930-01-139-4278
NSN 6130-01-652-7285
NSN 5990-00-221-0878