A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5999-01-055-4947
NSN 5960-01-399-4327
NSN 5910-00-203-2119
NSN 5930-00-293-8197
NSN 5999-01-379-9794
NSN 2925-01-400-2286
NSN 6645-00-873-4642
NSN 6220-01-308-1875
NSN 6610-01-328-8098
NSN 6150-01-398-0223
NSN 6650-01-252-4155
NSN 4140-01-442-4675