A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 6240-00-928-5911
NSN 5920-01-559-9095
NSN 5915-00-269-9252
NSN 5985-01-604-6090
NSN 5996-01-192-8606
NSN 6220-01-628-7571
NSN 2925-00-947-9814
NSN 5925-01-524-8058
NSN 5925-01-433-5323
NSN 6240-00-112-5243
NSN 6220-00-933-5144
NSN 5945-01-053-0032