A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 6685-00-198-9506
NSN 5915-01-022-8596
NSN 5990-01-143-2518
NSN 5999-00-179-2860
NSN 6110-00-256-4309
NSN 5985-00-883-9092
NSN 4140-00-236-3239
NSN 5905-01-403-2806
NSN 6105-01-615-4935
NSN 6650-00-127-3010
NSN 5945-01-242-9764
NSN 5960-01-036-8175