A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 6220-00-566-2848
NSN 5930-01-356-8267
NSN 6105-00-874-1885
NSN 5910-01-449-2243
NSN 5999-01-142-7906
NSN 6220-00-279-8819
NSN 6110-00-927-1794
NSN 5935-00-391-5883
NSN 5960-01-090-9291
NSN 5975-01-430-4931
NSN 5965-01-541-0879
NSN 5960-01-521-0626