A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5990-01-089-9694
NSN 5996-01-024-7826
NSN 6620-00-635-7347
NSN 6610-00-186-9180
NSN 6650-01-524-4245
NSN 6150-01-014-5691
NSN 6610-01-247-1798
NSN 4140-01-217-6290
NSN 5999-01-514-8364
NSN 5895-01-521-3633
NSN 5920-01-189-9248
NSN 5910-00-617-0401