A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5915-01-235-2144
NSN 6645-01-461-9250
NSN 5920-01-398-0580
NSN 6650-01-468-7704
NSN 5910-01-602-1663
NSN 6110-01-243-1287
NSN 5920-00-905-4769
NSN 5930-01-227-7268
NSN 5910-00-959-6889
NSN 6610-01-168-7943
NSN 5975-01-477-4192
NSN 2925-00-157-1602